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  Shift problems under hard acceleration

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Author Topic:   Shift problems under hard acceleration
Tom G
Gearhead

Posts: 141
From: Bethlehem, Pa USA
Registered: Nov 2001

posted 01-27-2002 09:10 PM     Click Here to See the Profile for Tom G   Click Here to Email Tom G     Edit/Delete Message   Reply w/Quote
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?

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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

posted 01-28-2002 03:23 AM     Click Here to See the Profile for Rory McNeil   Click Here to Email Rory McNeil     Edit/Delete Message   Reply w/Quote
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"

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78 Fairmont 428 4 speed [email protected]
80 Fairmont 302 5 speed [email protected]
85 Mustang NHRA Stocker under construction, 302 5 speed

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Moneymaker
Administrator

Posts: 19611
From: Lyons, IL, USA
Registered: May 99

posted 01-28-2002 12:39 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Worn out synchros will do it also.

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Alex Denysenko
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Tom G
Gearhead

Posts: 141
From: Bethlehem, Pa USA
Registered: Nov 2001

posted 01-29-2002 07:12 AM     Click Here to See the Profile for Tom G   Click Here to Email Tom G     Edit/Delete Message   Reply w/Quote
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.

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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

posted 01-29-2002 09:25 PM     Click Here to See the Profile for JohnnyBadBoy   Click Here to Email JohnnyBadBoy     Edit/Delete Message   Reply w/Quote
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

posted 02-02-2002 05:43 PM     Click Here to See the Profile for Tom G   Click Here to Email Tom G     Edit/Delete Message   Reply w/Quote
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

posted 02-02-2002 07:48 PM     Click Here to See the Profile for johnmustang   Click Here to Email johnmustang     Edit/Delete Message   Reply w/Quote
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

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65 2+2 FASTBACK
68 COUPE
87 TAURUS WAGON
98 F150 XLT TRITON V8 4.6, 4 WHEEL DRIVE
Member:Vancouver Island Mustang Association
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