Bense, if you would like to add this to your trans topic, it would be great.

Thanks to David from synchrotech the genius of trannies. Heres info that can really help.
I have alot of customers ask, i need a lsd but cant tell if its a b16/ls or gsr cause the sticker is ripped off.
3 ways to confirm.
#1 your ring gear. The big hole where the diff fits into. The measurements are close but different. B16 is 116.8 mm and the gsr will measure 119.8. edge to edge
#2 your ring gear face. along the oem ring gear face they both have id lines that run around on the teeth. If it has 2 id lines one top and one bottom its a B16, if it has 1 id line in the middle its a gsr.
#3 stock oem 3rd gear on the main shaft, count the teeth and double count cause they are only 1 off to differentiate the 2. If you count 24 teeth on the main shaft 3rd gear its a B16, if you have 25 teeth than its a gsr.

Hope this helps everyone.

 

Great info

 

The LS FD also has 2 ID lines on the R/G with a 109.8mm hole but with a 64 tooth ring gear.

B series transmissions 1994-2001

LS: 64T (tooth) R/G 2 lines (109.8mm), 15T C/S 2 lines, 26T M/S 3rd 2 lines.

GSR: 66T R/G 1 line (116.8mm), 15T C/S 3 lines, 25T M/S 3rd 1 line.

B16 66T R/G 2 lines (109.8mm), 15T C/S 3 lines, 24T M/S 3rd no line.

 

here ya go dave LOL

http://www.ff-squad.com/tech/temp/Bgears.htm

 

good info. i should go threw some of my junk and figure out what i really have laying around.

 

This GSR or B16?

 

It is a GSR (116.8 mm diameter hole and 1 ID mark in middle of tooth)

 

Great info, this should be stickied