ok, i have a 87 iroc, with a 305 4bbl, and its got a limited slip rear, and im wanting to get some 3.73's, when buyin them what should i look for, i know its a 10 bolt but does it even matter what bolt patten, and also, what is it 8"8, 8"5, i dont know, but please help, thanks dan

 

 

please anybody

 

You have a 7.5" (or 7 5/8, doesnt matter, basically the same thing) 10 bolt rear end. You will want to look for gears ONLY for that rear end because they are the only ones that will fit. If you have 3.08 gears or lower gears then you have a 2 series carrier and will need to purchase 3.73s for a 2 series carrier. IF you have 3.23 gears or higher then you have to purchase 3.73s for a 3 series carrier.

Those 8.5", and 8.8" are simply other rears ends for different cars. The 8.8" rear went on mustang GTs, and the 8.5" rear i believe is a GM 12 bolt rear.

I hope this helps. If you go to Summitracing.com or Jegs.com, and look under Richmond gears. Find the 2 3.73s for a GM 7.5" 10 bolt, one will be 2 series, one will be 3 series.

 

well how do i know what its got right know

 

OEM GM 3.73 10 Bolt 8.5" Ring & Pinion Gears
Item # 1817757713


Item located in: Parts & Accessories:Parts:Car & Truck:Chassis/Suspension

Currently US $60.00 First bid US $60.00
Quantity 1 # of bids 1 (bid history)
Time left 23 hours, 52 mins + Location Monroe, La
Country United States
Started Mar-31-02 18:38:51 PST (mail this auction to a friend)
Ends Apr-05-02 18:38:51 PST Watch this item

Seller (Rating) dirtyh3 (9)
(view comments in seller's Feedback Profile) (view seller's other auctions) (ask seller a question)

High bid leemsi (3)
Payment Money Order/Cashiers Checks. See item description for payment methods accepted
Escrow Accepted. Buyer will pay for escrow.learn more
Shipping Buyer pays fixed shipping charges. Will ship to United States only. See item description for shipping charges.




Seller assumes all responsibility for listing this item. You should contact the seller to resolve any questions before bidding. Auction currency is U.S. dollars (US $) unless otherwise noted.



You are bidding on a ring and pinion gear set. These are OEM GM 10 bolt 8.5" 3.73 gears. Sorry no picture. (camera broke) but, these things are in excellent condition. They came out of the front differential of an early 90s K5 Blazer (They will fit front or rear though, dont worry) Being they came out of the front, They have virually no wear at all. Itll be almost like putting a brand new set in your ride. Trust me.. Excellent condition!! Buyer pays shipping and insurance rate of $20 anywhere in US...(ill use the fastest service that $20 will get) I will accept money order or cashiers check.. Feel free to email any questions. Good Luck!


Free Counters powered by Andale!


Payment Details
U.S. Shipping and Handling US $20.00
Shipping Insurance per item -
Sales Tax (none)

Learn more about checkout


Payment Instructions
See item description or contact seller for more information.

OEM GM 3.73 10 Bolt 8.5" Ring & Pinion Gears
Item # 1817757713

Current bid: US $ US $60.00
Bid increment: US $ 1.00
Your Maximum bid: US $ (Minimum bid: 61.00 )


eBay will bid on your behalf up to your maximum bid , which is kept secret from other eBay users. The eBay term for this is proxy bidding .



Your bid is a contract
Place a bid only if you're serious about buying the item. If you are the winning bidder, you will enter into a legally binding contract to purchase the item from the seller.
How Bidding Works
1. Register if you haven't already.
2. Read feedback left by others about this seller .
3. Read Payment and Shipping terms.
4. Contact the Seller if you have a question.
5. Make a Bid.


Home Browse Sell Enthusiasts Search Services Help
Copyright © 1995-2002 eBay Inc. All Rights Reserved. Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the eBay User Agreement and Privacy Policy .

 

Right in the title of that auction it says they are for an 8.5" differential. As was said earlier, you have a 7.5" diff. Soooo, they wont fit.

As was also said earlier, you need to get a gear set for a 7.5" 10 bolt, for either a 2 series or 3 series carrier, depending on what carrier you have in your car. This has been covered many many times in this forum. Try searching.

Also, You do realize that these gears should be installed by a professional because it requires know how and special tools, right?

 

got ya