Does my gear drive need a bushing?
07-18-2007, 09:47 AM
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Car: 1984 L69 Trans Am
Engine: 305
Transmission: T5
Does my gear drive need a bushing?
Back in 1999, I built a s/b and installed a Pete Jackson 'quiet' gear drive. As I recall, the instructions didn't specify installing a bushing but in retrospect, without one, what's to stop the cam from walking... and wearing a hole through the timing cover? Should I pull it back out?
Just getting around to finally installing the engine.
Just getting around to finally installing the engine.
07-18-2007, 10:38 AM
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Car: 88 GTA
Engine: 355
Transmission: TH350
Axle/Gears: 3.42 Auburn Pro
Re: Does my gear drive need a bushing?
If I remember right mine came with a little bushing that went in the center of the cam gear. I wouldn't recommend running it without it.
07-18-2007, 11:51 AM
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Car: 91 RS
Engine: 350 vortec
Transmission: T-5
Axle/Gears: not the best not the worst
Re: Does my gear drive need a bushing?
is this a roller block or a flat tappet?
if it is a roller block then it will have a thrust plate that should eleminate the need for the thrust botton/the bushing that goes in the center of the cam gear...
now if it is a flat tappet the cams are ground so that the lifters actually push the cam into the block ... i would put one in and shim it to what ever endplay spec you can find for the gear set might be like .005-7 or so
and you may need a new timing cover but i doubt it
if it is a roller block then it will have a thrust plate that should eleminate the need for the thrust botton/the bushing that goes in the center of the cam gear...
now if it is a flat tappet the cams are ground so that the lifters actually push the cam into the block ... i would put one in and shim it to what ever endplay spec you can find for the gear set might be like .005-7 or so
and you may need a new timing cover but i doubt it
07-19-2007, 12:08 AM
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Car: 1984 L69 Trans Am
Engine: 305
Transmission: T5
Re: Does my gear drive need a bushing?
It's a flat tappet. Looks like I will be pulling the timing cover.... Oh well, better to do it with the engine out, I guess.
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