Help finding ring & pinion part #'s
Thread Starter
Racer
Joined: Nov 2009
Posts: 285
Likes: 9
From: Waukesha Wi
Help finding ring & pinion part #'s
I bought a set of oem 354 gears that are supposed to be for 80-82 corvette the ring gear is in a GM box but the part number is gone.
I want to make sure they are for the car before i pull the rear end apart.
Both the gear and pinion have dana numbers on them but they dont come up when i search the dana website.
I'm thinking this is because they were gm issued parts?
Is there a way to trace these numbers?
Numbers on ring gear: Spicer 6385 T18437 MAIAD 986 46-13
pinion: Spicer T 32171 46-13 MAIAD 964 1
I want to make sure they are for the car before i pull the rear end apart.
Both the gear and pinion have dana numbers on them but they dont come up when i search the dana website.
I'm thinking this is because they were gm issued parts?
Is there a way to trace these numbers?
Numbers on ring gear: Spicer 6385 T18437 MAIAD 986 46-13
pinion: Spicer T 32171 46-13 MAIAD 964 1
Race Director
Joined: Oct 2000
Posts: 12,679
Likes: 3,130
From: Shamong, NJ
I can't tell what the gear set is for, but I can tell you that they are 3.54 gears.
The 46-13 on the gears, indicates the ratio. To determine the ratio, divide 46 by 13. 46 divided by 13 is 3.53846, or a 3.54:1 gear ratio.
I'm not too sure about that being an OEM set of gears though.
The only OEM gears offered for the 80-82 rear, were 3.07, 2.87 & 2.72. The aftermarket offered additional ratios, but I'm not aware that they were ever offered through GM.
The 46-13 on the gears, indicates the ratio. To determine the ratio, divide 46 by 13. 46 divided by 13 is 3.53846, or a 3.54:1 gear ratio.
I'm not too sure about that being an OEM set of gears though.
The only OEM gears offered for the 80-82 rear, were 3.07, 2.87 & 2.72. The aftermarket offered additional ratios, but I'm not aware that they were ever offered through GM.
Thread Starter
Racer
Joined: Nov 2009
Posts: 285
Likes: 9
From: Waukesha Wi
Your correct on the factory installed ratio's,but these would have been available through GM parts as performance upgrade? Spicer is the OE supplier for 80-82's,but also for later C4's too.
Was hoping there was a way to trace the numbers to find out exactly what i have before tearing out the rear.
Was hoping there was a way to trace the numbers to find out exactly what i have before tearing out the rear.
Race Director
Joined: Oct 2000
Posts: 12,679
Likes: 3,130
From: Shamong, NJ
The regular Corvette Parts Books only list the stock ring and pinions. GM Performance Parts were never listed in the regular Parts Book.
Performance parts were listed in either the older "Chevy Power" books, or more recently the "GM Performance Parts" Catalog. Unfortunately, I don't have any of these books from the 80's. My Chevy Power book is from 1978 and all of my Performance Parts Catalogs are from the 90's-00's.
None of the Performance Parts Catalogs I have list any gear sets for the Corvette Dana 44 rears. The only Dana 44 gears they list are for the Camaro/Firebird, along with gears sets for various 10 bolt rears.
I took a quick look at the Dana/Spicer website, and the only ratios they list for any of the Corvette rears (the 80-82 44, the 84 up 44 and the 84 up 36) are the stock ratios too.
Performance parts were listed in either the older "Chevy Power" books, or more recently the "GM Performance Parts" Catalog. Unfortunately, I don't have any of these books from the 80's. My Chevy Power book is from 1978 and all of my Performance Parts Catalogs are from the 90's-00's.
None of the Performance Parts Catalogs I have list any gear sets for the Corvette Dana 44 rears. The only Dana 44 gears they list are for the Camaro/Firebird, along with gears sets for various 10 bolt rears.
I took a quick look at the Dana/Spicer website, and the only ratios they list for any of the Corvette rears (the 80-82 44, the 84 up 44 and the 84 up 36) are the stock ratios too.
