pinion gear install

baine21225 · January 4th, 2009, 11:27 AM

Originally Posted by Darrell

It depends if you over gear the car or not. Alot of people over gear because they think bigger is better. Too much gear can reduce your trap mph but could also result in a lower ET because of faster acceleration in the first half of the track.

i'm putting 4.10's in an aod, figured that was a good fit

baine21225 · January 4th, 2009, 11:29 AM

Originally Posted by Iwannagofast

i really think you should do a write up with pics on the whole procedure because im about to do the exact same thing to my car.....also how do gears affect your trap speed at the track....i have heard people say that they went faster and some said that have gone slower

i don't have enough knowledge on the subject to post a write up, my uncle is going to do most of mine

Iwannagofast · January 5th, 2009, 12:16 AM

yeah im actually gonna dive it my installation tomorrow.....i havent ever done it but read a lot about it on this site.....i have a buddy coming over that did a full gear install into a dakota he used to have so i think we will be able to get it finished eventually....ill probly be on here askin some questions tho through out the day.....and about the mph vs et question....im goin with 3.73s....will i lose mph or gain....me and my roommate have been wondering....i know the et will be fast....this will be 1/8th mile and 1000 ft track

93hatch · January 5th, 2009, 12:54 AM

it was easy we did mine today, but it whines therefore i will give no advice cuz it wont be very good

Iwannagofast · January 5th, 2009, 02:12 AM

i know you guys have more experience but how long did it take you start to finish....and where can i get the bearings pressed on at

93hatch · January 5th, 2009, 11:25 AM

Originally Posted by Iwannagofast

i know you guys have more experience but how long did it take you start to finish....and where can i get the bearings pressed on at

call a machine shop, and it took us maybe 4.5 hours to pull my diff off, my friends diff off, tear them both apart and another spare one that the 4.10s came out of, put everything back together and put both diffs back on and bleed the brakes, if it was just one car it prob woulda been more like 2.5 hours, and just grab a phone book and look for machine shops by you

Brian@PAR · January 7th, 2009, 12:43 AM

If your installer does not have all the tools and equipment to do the job then you are best off going to someone else. Pinion depth should be measured although it can be done with only marking compound. Backlash has to be measured.

The pinion depth is set by placing shims under the pinion bearing, which is pressed on. If you have to set the depth without measuring you have to guess at the shim thickness, set it all up and check with marking compound. If it's wrong then you have to take it all back apart, pull the bearing off, guess on the next size shim and do it all over again. To get it set up right can take a long time.

Take a look at this write up.

8.8 Axle Gear Install

It's not a hard job for someone who is experianced and has all the right equipment. If you are doing it in your driveway it can be a real bear.

baine21225 · January 7th, 2009, 12:46 AM

good write up, my uncle is a car junky with a lift, i'm just going to hover mostly...thanks for the helpful info

January 5th, 2009, 12:54 AM	#24
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	it was easy we did mine today, but it whines therefore i will give no advice cuz it wont be very good __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

January 7th, 2009, 12:43 AM	#27
Brian@PAR Newbie Join Date: Nov 2008 Location: Phoenix AZ Posts: 25 iTrader: 0 reviews	If your installer does not have all the tools and equipment to do the job then you are best off going to someone else. Pinion depth should be measured although it can be done with only marking compound. Backlash has to be measured. The pinion depth is set by placing shims under the pinion bearing, which is pressed on. If you have to set the depth without measuring you have to guess at the shim thickness, set it all up and check with marking compound. If it's wrong then you have to take it all back apart, pull the bearing off, guess on the next size shim and do it all over again. To get it set up right can take a long time. Take a look at this write up. 8.8 Axle Gear Install It's not a hard job for someone who is experianced and has all the right equipment. If you are doing it in your driveway it can be a real bear. __________________ PeteAndersonRacing

January 7th, 2009, 12:46 AM	#28
baine21225 MM Fanatic Join Date: Jun 2007 Location: Baltimore, MD Posts: 4,349 iTrader: 1 reviews	good write up, my uncle is a car junky with a lift, i'm just going to hover mostly...thanks for the helpful info __________________ "That's how Dad did it, that's how America does it... and it's worked out pretty well so far..."

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