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Author
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Topic: 75 granada tranny
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drgentry
Journeyman Posts: 7
From: south texas
Registered: Jun 2001
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posted 03-13-2002 08:04 PM
   
I found a 75 granada with a 3 speed w/ overdrive. Will it bolt up to my 289 in my 65 FB? And if it does, how strong is it and will I have to make any alterations?
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67coupe
Gearhead Posts: 229
From: dallas NC usa
Registered: Nov 2000
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posted 03-13-2002 11:42 PM
it will bolt up but the ratios of that tranny sux its more like a truck trans close 1-2 long 3 soso to 4 need atleast a 4.11 rear to make it run------------------
Josh
67 coupe with 351c
94 Explorer
30 model A currently rustbucket
in process 67 convt with efi 5.0 and t5
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steve'66
Gearhead Posts: 4307
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 03-14-2002 12:14 AM
Actually,That's a good tranny! Melissa (my daughter) ran her best times with that tranny behind a 351w in her '66 mustang. At least until we went to a race c-4. She ran a 12.54 with it and a 12.68 best with a t-5. You'll need to modify the linkage to a straight H pattern unless the previous owner has already done it and a 4.10/4.11 gear is perfect for it. The tranny is actually from a late '70s F-150 and someone swapped it into a Granada like my dad did, then stored it in his basement. It is a "toploader" and is the same size as a v-8 3 speed. Good luck! SteveW
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PonyDoc
Journeyman Posts: 64
From: Ft. Lauderdale
Registered: Jun 2001
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posted 03-14-2002 12:27 AM
I've had one in my Mustang for almost 11 years. I have a 2.80 rear and tach almost 3K @ 90 MPH. I do a lot of driving and get 20-22 w/ a 4V, cam, tri-y's. There were 2 versions, so you have to be careful. The car one was a .80:1 final and has the small bearing in the rear of the case. You need the Mustang toploader tailshaft or an aftermarket shifter to make it fit. The toploader tailshaft allows you to use the stock shifter and rods, except you have to invert the 3-4 rod, or the shift pattern is backwards. Ford reversed 3-4 where the old 4 is the 1:1 and 3rd is where the OD gear is. I forget sometimes, until I shift the 1st time, than back on the lift to reverse the rod. The other trans is the truck version. The big difference is the rear bearing. It's much larger and the regular tailshaft won't slide over it. It's a .69:1 final, so with my 2.80, it was a slug! until I was at 80MPH. I'm looking for a 3.25, so I'll have a 2.25 final in OD and still get good mileage. I found an old machine shop to mill the tailshaft and it cost $35. It's a much heavier duty trans. Use this with a 4.11 and you get a 2.83 final! Good for gas mileage and still jumps over small bushes! The only tell-tale sign, is the "ORION" marking on the case. It's a D7XX engineering # also. Let me know if you have any Q's.
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steve'66
Gearhead Posts: 4307
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 03-14-2002 12:30 AM
In other words it'll bolt right up to your 65 fb's 289 and will need a rear end gear swap and a wide power ranged engine to perform at it's best! But even with a stock 289 it'll act like 4.11 gears w/a 3 speed, but with 3.0 gears in OD (4th).  The speedo may run backwards, unless the granada guy switched the speedo drive gear on the tailshaft already.  I highly endorse the swap! Can you tell?? It's as strong as any toploader too, except for in 4th (od) but who's gonna be beating on that gear? LOLSteveW
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drgentry
Journeyman Posts: 7
From: south texas
Registered: Jun 2001
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posted 03-14-2002 09:54 AM
Thanks guys.I didn't mention its a 6 cylinder car the tranny is coming out of. Will that make a difference?
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TomP
Gearhead Posts: 4055
From: Delta BC Canada
Registered: Dec 99
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posted 03-15-2002 01:55 PM
Truck and Granada cast iron case overdrive trannies fit the same. the D7DR # and the shifter bolt pattern are differnt than older toploaders. Look for the 3-4 shift lever to be upside down also.[This message has been edited by TomP (edited 03-15-2002).]
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TomP
Gearhead Posts: 4055
From: Delta BC Canada
Registered: Dec 99
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posted 03-15-2002 01:55 PM
the 6 cylinder one fits the same.Like mentioned above, the ratios are not too great. The drop 1st to second is big, but 2nd to 3rd kills all momentum. In a car like my 351W Falcon convert it was probably 1/2 second slower than a normal toploader would be... thats with 3.89 gears. If the tranny is cheap enough, go for it. But don't pay regular toploader prices for it. The Hurst stick bolts straight to that tailhousing with no adapters.
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