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Author
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Topic: Shift problems under hard acceleration
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Tom G
Gearhead Posts: 141
From: Bethlehem, Pa USA
Registered: Nov 2001
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posted 01-27-2002 09:10 PM
   
Question for all you 4-speed nuts out there. What could cause hard or missed or locked out it seems shifting of a 67 toploader trans with a Hurst comp plus shifter with new linkage, rods and clips just installed alignment piece, goes in fine but car won't shift smoothly or at all going from 2-3 or when trying to down shift from 4th to 3rd. Any suggestions?------------------
67 Mustang F/B 70 351C 4V 4 speed. Project at the moment though on the street. [This message has been edited by Tom G (edited 01-28-2002).]
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Rory McNeil
Gearhead Posts: 1177
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 01-28-2002 03:23 AM
Check to make sure that the clutch is disengaging adequatly. Years ago I had a 70 Mustang with a 351C 4v, 4speed, & the clutch cross shaft was slowly bending at the lower lever, causing increased freeplay, and not enough pedal "reserve"------------------
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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Moneymaker
Administrator Posts: 19611
From: Lyons, IL, USA
Registered: May 99
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posted 01-28-2002 12:39 PM
Worn out synchros will do it also.  ------------------
Alex Denysenko
Co-Administrator and Moderator
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Tom G
Gearhead Posts: 141
From: Bethlehem, Pa USA
Registered: Nov 2001
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posted 01-29-2002 07:12 AM
quote:
Originally posted by Moneymaker:
Worn out synchros will do it also.
Not what I really needed to hear but I had the same thoughts more than once.------------------
67 Mustang F/B 70 351C 4V 4 speed. Project at the moment though on the street.
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JohnnyBadBoy
Journeyman Posts: 11
From: Bloomsburg, PA
Registered: Jun 2001
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posted 01-29-2002 09:25 PM
Tom, how old is the gear lube in the tranny. When i first bought my 67 4spd, it wasn't shifting very well. I just wanted to check to see if it had any fluid at all and the stuff that came out was horrible looking. After changing the fluid the car shifted great. Good luck
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Tom G
Gearhead Posts: 141
From: Bethlehem, Pa USA
Registered: Nov 2001
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posted 02-02-2002 05:43 PM
quote:
Originally posted by Rory McNeil:
Check to make sure that the clutch is disengaging adequatly. Years ago I had a 70 Mustang with a 351C 4v, 4speed, & the clutch cross shaft was slowly bending at the lower lever, causing increased freeplay, and not enough pedal "reserve"
Adjusted the clutch out some more . It helped but shifts are still "balky". I think as one forum member has already suggested that the synchros are going or gone. It is very hard to down shift to 3rd without a blip or two of the throttle. Upshifts could be better also. I got spoiled years ago with a couple 68 GTO's I had, you could almost throw the shifter to the next gear. I never have had a stick FORD till the 67 I had plenty of auto and a few "stick" pickup trucks.
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johnmustang
Gearhead Posts: 4088
From: Vancouver Island , British Columbia , Canada
Registered: Nov 2001
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posted 02-02-2002 07:48 PM
Had the same problem a few years back , when I had my 68 fastback, 302 4spd. It was the synchros that were hooped. Hate to say it but thats what it sounds like to me. JOHN ------------------
65 2+2 FASTBACK
68 COUPE
87 TAURUS WAGON
98 F150 XLT TRITON V8 4.6, 4 WHEEL DRIVE
Member:Vancouver Island Mustang Association
M&M #1710
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MY TRUCK
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