Check the web site for Precision Gear in Mich
for 3:73 gear sets for B-W 9 bolt.
www.precisiongear.com/gmhtm

 

that links not working for me...

 

They're pages are down again. Under construction signs on web pages are very poorly designed web sites. If the web site isn't complete, just leave it down or finish as much as you want to display.

Anyway...

Are you sure they're 3.73. Others have listed that but have also said the gears are 37:10 which is 3.70 not 3.73.

 

Try a web search for gear and pinion sets and
it will take to a page #65 as GM which is
Precision Gear's site. 3:73 ratio 37-10
p/n GM7A/373 for a 9-bolt, only set offered.
Page also lists install kits and other items.

 

37 divided by 10 is 3.70!! NOT 3.73!!! The 3.73 is 41 divided by 11.

 

I have 3.73's not 3.70's (for 9 bolts). I also 4.10 gear sets in stock, new series 3 carriers, and other stuff soon as well as 3.4x and 3.9x gear sets. Everyone else that claims they have 3.73's has 3.70's (10 tooth pinions). I can get you (and currently have in my car) the stronger 3.73 (11 tooth pinions).

COPY AND PASTE the following to see the 4.10 gear sets and new series 3 carriers.
EDIT: www.koolmeister.com/set2.jpg (it's getting late )


Miles

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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES, it is a 9 bolt & YES they are 3.73's, not 3.70. I currently have 4.10 gear sets and new series 3 carriers in stock for 9 bolts )
www.koolmeister.com

[This message has been edited by 88 427 Camaro (edited August 16, 2001).]

 

I've been in the process of swapping the Precision gear set into my Formula for the last few weeks. Box is marked 3.73 but they are 3.70's. Their fit leaves much to be desired from an outfit called precision.
I'm not gonna blame who I got them from but the supplied rear pinion bearing was a piece of crap, and it's taken me awhile to figure out the shimming to get it to go. I'm waiting again on a new crush sleeve before final assembly. I've wasted a bunch of pinion seals also.
The short end to a long story: I had to remove the factory shim from the rear pinion bearing and make a shim for the front pinion bearing to take up the slack.

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'89 Formula - Thunderchicken - 355 Vette L98/T-56/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.