AirSpeed VW Community Forums
Technical => Transmission Forum => Topic started by: Buggytime on September 25, 2011, 12:15:14 AM
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I just picked up an IRS transmission and it has the following code on it:
38
113 301 103
J
VW
AH4010755
I was wondering if anyone can tell me what the 38 and the J stand for.
I have researched the codes, and I believe it is a 4.125 gear ratio.
It also has two sideplates on it, which I remember someone telling me in the past that it means it's a 4.125 ratio.
The guy I bought it from said it came out of a '73 Super Beetle.
Are these good strong trannys? Or are the 3.88 gear trannys more durable? I have a street buggy with a tired tranny, the 3rd gear slips when I drop it into 3rd. And not to mention a couple other flaws.
And here's the dumb question, the trannys use 80-90W gear oil right?
Thanks
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80-90, yes
the 3:88 trans has a stronger 9tooth first gear and main shaft, the 3:88 is also a stronger ring/pinion but it's geared taller. For off road the 4:12 may work better.
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Would it be better to have my current transmission repaired, rather than taking my chances on another used one? I think it might need a new input shaft bearing, and perhaps getting the 3rd gear welded. If anyone is interested, please let me know.
Thanks
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I was wondering if anyone can tell me what the 38 and the J stand for.
Insignificant casting numbers
It also has two sideplates on it, which I remember someone telling me in the past that it means it's a 4.125 ratio.
Not necessarily. I've seen double side cover IRS with 4.37, and with 3.88. Most common is 4.12.
The guy I bought it from said it came out of a '73 Super Beetle.
It may have been in a 73 Super at one time, but that's not what VW put in a 73 Super.
Are these good strong trannys?
Probably strong enough for what you're going to do with it.
the 3rd gear slips when I drop it into 3rd.
Check your clutch first.
the trannys use 80-90W gear oil right?
sure.
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Thanks Bruce, but I am assuming that it's the 3rd gear in the tranny because I can drop it hard into 1st and 2nd gear without any slipping, so I think the clutch is good even though it's stock. And I'm not sure if this matters but the motor is a 1968cc.