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Author
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Topic: Too much gear?
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MrWesson22
Gearhead Posts: 610
From: Dacula, GA
Registered: Sep 2000
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posted 01-06-2002 09:43 PM
   
I'm thinking about picking up a used diff with 4.62 gears for my car. I'm currently running a close ratio toploader, so I need all the gear I can get. I have a 28" tire and will be spending about 80% strip, 20% street. My street driving is mostly around town, but I do drive highway some (out to Athens - about 35 miles - 65mph speed limit) about once a month or so. I'm anticipating a shift point on the new combination around 6700 rpms. Assuming I have a trap speed of around 110mph (just a guess), that would be 6100 rpms. I guess I'm somewhat trying to talk myself into it. Never fear the gear, right? It'll be great at the track, but it's really too much for the street. Am I crazy, or should I just go for it?Edit: Actually, I think my toploader is a close ratio, but I don't know for sure. How can I tell? I know it's a 68 smallblock toploader, but I don't have all the #s off of it. Is there any way I can tell without driving the car? ------------------
Neal
Member #723
[email protected] AIM: MrWesson22 69 Gulfstream Aqua Grande
351C/Toploader 4sp [This message has been edited by MrWesson22 (edited 01-06-2002).]
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Ryan Wilke
Gearhead Posts: 607
From: Stanton, Michigan
Registered: Oct 2000
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posted 01-06-2002 09:56 PM
Neal,
Let that Cleve' of yours breathe!!! Buy & install my barely-used 5.14 gear set (for a 9"; 90$) and get those revs up & let it breathe, breathe, breathe!!!As you said, "Never fear the Gear"! Ryan 
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cpmaverick
Moderator Posts: 1256
From: Auburn, AL.
Registered: Jan 2000
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posted 01-06-2002 11:32 PM
20% street. I'd say got for it, but I guarantee you you won't drive 65 mph in it for very long. I had 4.11s and 65 was awful. ------------------
-Charlie Ping
1970 Maverick Grabber
[email protected] with AC and overdrive.
http://www.maverickgrabber.com
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Rory McNeil
Gearhead Posts: 557
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 01-07-2002 04:18 AM
4.62 is a ratio for a 8" rearend, not offered for a 9". If you go 110 mph, thats good for high 11`s. Way to much for a 8", especially with a 4 speed!------------------
78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA Stocker under construction, 302 5 speed
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chris eck
Journeyman Posts: 11
From: PalmHarbor Fl. U.S.A.
Registered: Oct 2001
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posted 01-07-2002 08:42 AM
I would stay with 4.11s or 4.30s and have a set of take offs or spares with a taller diameter to bring the revs down on your highway trips.Besides your track tires should be for the track only unless your running the drag radials which only seem to last about max 10,000 mi. depending on your driving foot preasure.You could also run a smaller diameter at the track only which would wind her up faster.Just some more for you to think on.
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Moneymaker
Administrator Posts: 11493
From: Lyons, IL, USA
Registered: May 99
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posted 01-07-2002 03:21 PM
Never can have too much gear! 
Seriously the 4.62 is a walk in the park for a 7000 RPM capable Cleveland. You can install tall rear tires for the street to cut some of it back. DOn't plan on any real slicks with a stone stock 8 inch and a 4-speed. SOme prep work is required to make it live. ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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MrWesson22
Gearhead Posts: 610
From: Dacula, GA
Registered: Sep 2000
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posted 01-07-2002 03:32 PM
I forgot to even mention this would be a temporary thing until I can afford a custom 9" from moser. It obviously is an 8" rear. I'll stay on street tires with the 8". Would 4.62s be a complete waste of time on street tires? I'm thinking 1st gear would be useless even at the track.Anyone know about my close vs wide ratio question?
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Neal
Member #723
[email protected] AIM: MrWesson22 69 Gulfstream Aqua Grande
351C/Toploader 4sp
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steve'66
Gearhead Posts: 3653
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 01-07-2002 03:58 PM
Neal,Do you have any of the tag # off the trans? I have a chart, but it doesn't show any 1968 smallblock toploaders. There are several 1967 s/b's in both wide and close ratios. SteveW
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TomP
Gearhead Posts: 3609
From: Delta BC Canada
Registered: Dec 99
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posted 01-07-2002 04:51 PM
the 68 smallblock tranny should be a wide ratio. A waste? the 8" with 4.62's and street tires, i'd say so. You don't need a custom Moser 9"... for that car 9" housings are easy to find. Stock 28 splines should work until you go 11's then it'd be best to spend the money first on the 31 splines, these again can be stock Ford parts.
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MrWesson22
Gearhead Posts: 610
From: Dacula, GA
Registered: Sep 2000
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posted 01-07-2002 05:40 PM
I need my rear narrowed around 3-4" from stock 69 width for the wheels I'm running right now and minitubs may be in my future. The goal is somewhere around 11.70s on motor, then I'll be hitting it with nitrous. I don't think stock 31 spline components will hold up very long with mid 10 second ets. They might, but I also will probably go stroker big block when I'm done with the cleveland. I'm the type that would rather build it once and have it overkill in preparation for the future than have to do it over again later - thus the custom moser 9". A rearend can never be "too strong" for a combination, so I might as well. Besides, when you add up the cost of getting a stock rear narrowed, converting to rear discs, aftermarket axles, and an aftermarket chunk, it's right where a custom rear would have been to begin with anyway.Would I hook well enough on drag radials to frag this 8" all over the place, or do I have to run normal old street tires? I'm thinking I could use the gear with drag radials but it's way too much for normal street tires.
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Neal
Member #723
[email protected] AIM: MrWesson22 69 Gulfstream Aqua Grande
351C/Toploader 4sp
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Just Strokin
Gearhead Posts: 179
From: Tuscaloosa, Alabama
Registered: Dec 2001
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posted 01-07-2002 07:06 PM
Not sure what the conversion from 1/8 to 1/4 mile et's are, but I ran an old pinto with a 9" and 5.67 gears with shortened-resplined Ford 31 spline axles and a detroit locker and never had a bit of trouble from it. we ran 6.80's 6.90's with it. Way too much gear for the old 351c and c6, but sometimes you have to make do with what you have.
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kid vishus
Gearhead Posts: 1994
From: huh?? what? who? ME!?!?!?!
Registered: Oct 2000
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posted 01-07-2002 09:11 PM
I got to 7.30's in the 1/8 with stock shortened 31 spline axles. Then I broke 2 of them in a 4 week period. I bought my mosiers, never had any problems since. And that 4 speed is going to be a little harder on them than my c4 with transbrake was.
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Just Strokin
Gearhead Posts: 179
From: Tuscaloosa, Alabama
Registered: Dec 2001
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posted 01-07-2002 10:20 PM
Hey Kid, you have a spare Tbrake for a c4 to dispose with?
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chips67
Gearhead Posts: 537
From: louisville, ky, usa
Registered: Jul 2001
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posted 01-08-2002 08:54 PM
yes, 4.62's are a waste with street tires. you wont get in the 7's/11's without either a decent drag tire out back or a serious load of hp. look, the viper ran like 12.2's in the 1/4 on wide factory rubber and it had 450 hp. anyway, get the 9 inch, get the 31 splines, and get either et streets or a real set of slicks on spare rims to swap on at the track. btw, i run a 4 speed....easiest way to find out if its close or wide ratio is this....jack up the rear end, wheels hanging. mark a line on the drive shaft, mark line on the tire. put a pointer on th tire and shaft and count how many turns it take the shaft to turn the tire on full rotation. if its 2 3/4 turns its a wide ratio (lower first gear)...if its 2 1/3 turns, its a close ratio (higher first gear). EASY!!! do it that way. you hope its the wide ratio trans, the close one is for those road course girls. maybe if you aint got the right one, somebody will trade you. also, getting a 4 speed car to hook aint just slapping slicks/bars on. definetly get a locker, get good drag shocks...all the way around. stuff im still waiting to get. trust me, good luck.------------------
67 coupe, 650dp and rpm intake on 5.0 with afr 165 heads, 4 speed, 4.11's.....best so far is [email protected] in 1/8 mile with 1.79 60ft. time.
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TomP
Gearhead Posts: 3609
From: Delta BC Canada
Registered: Dec 99
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posted 01-08-2002 10:47 PM
I went for 35 splines in my Fairlane...if i had to do it over again (and i might) i'd put a lower drag, lighter weight and scads cheaper 8.8 in it. A local fella has run 8.60's with just such a rear end. 1000hp, 3550lb car, 31spline stock width axles, launching on the tranny brake and even 4 lug wheels. He still runs an 8.8 as he goes for 7's (we ARE talking 1/4 mile here)He's upgraded now to 33 splines and 5 lug , but its still a stock 86-93 Mustang housing.
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Rory McNeil
Gearhead Posts: 557
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 01-09-2002 04:42 AM
Hey, Tom, yeah Dals Mustang is pretty awesome, but are you gonna run a PEE Glide like him? I doubt his 8.8 would be very happy with 6000 rpm clutch dumps. Plus I don`t think his car 60fts as good as our cars, even though it is a lot faster. Does he 60ft as good with the twin turbos as he did with that HUGE Vortech?------------------
78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA Stocker under construction, 302 5 speed
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Just Strokin
Gearhead Posts: 179
From: Tuscaloosa, Alabama
Registered: Dec 2001
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posted 01-14-2002 07:49 PM
here is another gear on eBay....says posi this time4.62 8" posi
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Fastymz
Gearhead Posts: 3433
From: Reno Nv MEM#1240
Registered: Apr 2001
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posted 01-14-2002 08:03 PM
"center is locked (welded) its definatley posi"This is the only part that I dont like.I jus dont see this working well on the street.SCOOP ------------------
65 coupe,351w,RPM intake,Carter625,shorty headers,2.5 exhaust, Flowmasters,C4,open 8" 2:80,Big Boss 429 hood scoop,Crager SS,Black Suede.
MEM#1240 https://mustangsandmore.com/ubb/Fastymz.html
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steve'66
Gearhead Posts: 3653
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 01-14-2002 08:27 PM
Scoop,Me neither! Maybe for a dirt track or a off-road only vehicle. It is not legal to weld the pinion gears of a drag car. SteveW
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Just Strokin
Gearhead Posts: 179
From: Tuscaloosa, Alabama
Registered: Dec 2001
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posted 01-14-2002 11:02 PM
I didn't read it all until I had made the post. OOOOOOOOOOOOPS
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TomP
Gearhead Posts: 3609
From: Delta BC Canada
Registered: Dec 99
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posted 01-15-2002 01:14 AM
a welded 8"?  ... might as well stick a Suzuki Samurai rear end in it... at least it's lighter and if you are gonna break stuff anyways...  I think the 8.8 in Dal's car is strong enough for my car... his car goes to around 6000 on the brake and thats hitting the thing with 1000+ hp ... i think he said a 1.32 60ft was his best... my car has gone 1.36 and is almost 2 seconds slower 
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I65Stang
Moderator Posts: 5087
From: Antelope, CA
Registered: Jun 99
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posted 01-15-2002 01:25 AM
Tom, I take it he runs c-clip elims? I hate *#$*@#* c-clip axles  . I dunno, I would rather run a rear that you can just take a pumpkin out of...------------------
Tim M&M Member #35
1965 Mustang coupe, 200 I6, Holley 2300, Clifford header, true duals w/ 26" Smithys
1988 Mustang GT AOD vert, 15.810 @ 88.871 mph 100% stock w/ no traction
1976 Silverline Comoro 18' trihull ski boat, 188 hp 302 I/O, another toy
http://all.at/mustang
https://mustangsandmore.com/ubb/I65Stang.html
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Moneymaker
Administrator Posts: 11493
From: Lyons, IL, USA
Registered: May 99
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posted 01-15-2002 01:22 PM
Suzuki Samuri?  ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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SteveLaRiviere
Administrator Posts: 21832
From: Saco, Maine USA
Registered: May 99
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posted 01-15-2002 01:25 PM
quote:
Originally posted by Moneymaker:
Suzuki Samuri?
They use them on moosemobiles up there!  ------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC "Speed costs money. How fast do you want to spend?"
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