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Ways to identify if your trans is a b16 or gsr

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Old 04-19-2011, 10:16 AM   #1
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Default Ways to identify if your trans is a b16 or gsr

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.
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Old 04-21-2011, 03:54 PM   #2
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Default Re: Ways to identify if your trans is a b16 or gsr

Great info
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Old 04-22-2011, 08:01 AM   #3
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Default Re: Ways to identify if your trans is a b16 or gsr

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.
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Old 04-22-2011, 08:12 PM   #4
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Default Re: Ways to identify if your trans is a b16 or gsr

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Old 04-28-2011, 06:44 AM   #5
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Default Re: Ways to identify if your trans is a b16 or gsr

good info. i should go threw some of my junk and figure out what i really have laying around.
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Old 03-13-2017, 09:55 PM   #6
 
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Default Isthis Gsr? Or.b16?

This GSR or B16?
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Old 03-15-2017, 06:46 AM   #7
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Default Re: Ways to identify if your trans is a b16 or gsr

It is a GSR (116.8 mm diameter hole and 1 ID mark in middle of tooth)
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Old 03-23-2017, 03:27 AM   #8
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Default Re: Ways to identify if your trans is a b16 or gsr

Great info, this should be stickied
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