th350.. when i go to reverse.."clunk" (little bit) - Hot Rod Forum : Hotrodders Bulletin Board
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Old 09-30-2006, 07:53 PM
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th350.. when i go to reverse.."clunk" (little bit)

i got a turbo 350 in my s10 pickup with a 2 stage shift kit. When i put it into reverse it usually clunks a little bit, not to the point where it sounds like something is broken but it is noticeable. It shifts hard into reverse, could that just be from the shift kit?
i know i have a diff leak, which im fixing tomorrow, could this be a problem to? not enough fluid to compensate for the gears moving and stuff??
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Old 09-30-2006, 08:06 PM
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I'd look into the U joints. if there servicable ( has grease fitting ), grease them and see if that takes care of it, if not get new 1's.
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Old 09-30-2006, 08:21 PM
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Quote:
Originally Posted by boneyard Buick
i got a turbo 350 in my s10 pickup with a 2 stage shift kit. When i put it into reverse it usually clunks a little bit, not to the point where it sounds like something is broken but it is noticeable. It shifts hard into reverse, could that just be from the shift kit?
i know i have a diff leak, which im fixing tomorrow, could this be a problem to? not enough fluid to compensate for the gears moving and stuff??

You may have an anti-clunk spring missing, it lays in a little cavity on the side of the case and holds tension on clutches & steels and prevents just what you are describing.
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Old 09-30-2006, 09:19 PM
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that is inside the diff??

and how hard is it to replace? and whats the spring worth?


also, it only does the 'clunk' when i go into reverse, going into drive is fine.
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Old 09-30-2006, 10:35 PM
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Quote:
Originally Posted by boneyard Buick
that is inside the diff??

and how hard is it to replace? and whats the spring worth?


also, it only does the 'clunk' when i go into reverse, going into drive is fine.

Nope, that spring lives in the trans case, locating the low OWC case positioner. Requires trans R&R and tear down to replace it.
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Old 09-30-2006, 11:53 PM
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Quote:
Originally Posted by boneyard Buick
i got a turbo 350 in my s10 pickup with a 2 stage shift kit.

i know i have a diff leak, which im fixing tomorrow, could this be a problem to? not enough fluid to compensate for the gears moving and stuff??
If it's leaking from the pinion seal, make sure the pinion flange isn't loose. Just might fix both problems that way.
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Old 10-01-2006, 02:16 PM
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tranny jerk

I have a question I've always been curious about. I have a 79' chevy truck with a TH400. When at a stand still after firing up my truck, When I shift to any gear from park, I get a pretty strong jerk from it. I've noticed this in alot of older vehicles I've been in. Is doesn't bother me, what causes this strong jerk in these older vehicles? Is it high torque? thanks in advance,
Mark
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Old 10-01-2006, 02:18 PM
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sorry

posted reply instead of new thread. Sorry, erase this.
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Old 10-01-2006, 04:04 PM
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Im guessing its just the anti-clunk spring in the transmission thats broken or just not there. Thats what someone told me on this post and ive been hearing alot more about it from friends since i've been asking.

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