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th350 shifts harder in drive?

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Old Aug 6, 2010 | 03:24 PM
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Default th350 shifts harder in drive?

i thought it should shifter harder when you manually shift it. but mine chirps the tires at part throttle on the 1-2 shift but if'n i shift it my self it will shift firm but not chirp the tires?
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Old Aug 6, 2010 | 07:13 PM
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Its because of over lap of the release of the low rev friction (not releasing fast enough)
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Old Aug 7, 2010 | 09:42 AM
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anything i can do to adjust that. im trying to decide if i can live with it or tear it out again to fix it or just do a 2004r instead. this car has 4.11 gears and i drive it alot so i have been thinking about doing the 200.

im guessing to fix the overlap is it valvebody related or shimming a clutch pack tighter?
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Old Aug 7, 2010 | 12:32 PM
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Why do you need to manually shift it?
If this vehicle is for drag racing/weekend usage with very little street miles install a reverse manual valve body. Most reverse v body's have no low clutch apply, and also freewheel in second (by eliminating the coast band).
This cleans up both the 1-2 and 2-3 shift.

If this is not a option for you, and your purpose of manual shifting is to raise the wot up shifts, then lighten the weights/springs on the governor to get the wot rpm where you want it. (note: this is kinda a bitch to get the rpms you want exact...takes a little time to do.)
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Old Aug 8, 2010 | 01:43 PM
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i just like having the option of shifting it myself. this car will probably never see the track (just my daily putter).
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