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Sat Aug 16, 2008 2:38 pm

I just aquired 3 sets of r&p...they apear to be different... just wondering if anyone knows how to figure the ratio...to find out if its a 3.88 or what

Thanks in Advance

Sat Aug 16, 2008 2:55 pm

divide the ring teeth by the pinion teeth.

Sun Aug 17, 2008 8:20 am

The teeth count is stamped on the side of the ring gear, along with a letter G, K, or O. The number 8 is 8 teeth on the pinion and then the number of teeth on the ring gear 35, 33, or 31. Most will have the letter G stamped in them. Example are G835 is a 4.375, G833 is a 4.125, and G831 is a 3.875.

The 6volt 4.375 only had 6 bolts on the ring gear, while the 4.12 & 3.88 had 8 bolts

R&P gears must remain a matched set, and can not be mixed. There should be a hand scribed number on the ring gear and the pinion gear.

Sun Aug 17, 2008 8:31 am

thanks that is great help...they are matched together (the pinion and ring)

Sun Aug 17, 2008 12:05 pm

You also need to check the pinion gear :shock:
See if it is a splined or keyed 4th gear shaft.

vwracerdave Quote: The 6 volt 4.375 only had 6 bolts on the ring gear, while the 4.12 & 3.88 had 8 bolts

Did you learn this info the hard way?
Like I did :lol:

Mon Aug 18, 2008 12:38 am

vwracerdave wrote: .... the number of teeth on the ring gear 35, 33, or 31. Some ring gears have 37 teeth.

Mon Aug 18, 2008 5:35 am

Bruce wrote: vwracerdave wrote: .... the number of teeth on the ring gear 35, 33, or 31. Some ring gears have 37 teeth.

Yes I knew VW made a 4.62 R&P but they are very, very rare and I didn't think they were ever used in any car delivered in the USA.