VW Gear Box Codes & Gear Ratio's

[Andersen Racing]

Hi
i have a type 2 automatic gearbox it came from a wasseboker abot 1990 enybody ho now the gear ratio? it has a oil coler
i have the gear box in me frends notchback and is perfeckt

Thanks

Andersen Racing Norway

[fastback]

Haynes book ....

1. 2,71
2. 1,50
3. 1,00

R/P 4.09 or 3,74 depending on trannycode.

[mountainkowboy]

Just picked up an AT29015 for the vert.......flyer trans

[Marc]

You could just put a pre`73 nosecone on it, but there are issues - the late mainshaft bearing isn't really compatible with the 2-bolt nosecones. Personally I use an aftermarket conversion mount instead. Late chassis have a stud on the LH framehorn for the ground strap (the other end goes to a sidecover stud/nut or bolt); you can weld one onto your chassis or simply use one of the rear mount-to-carrier bolts - it's not a good idea to try and put the ground strap in the early stock location with these urethane mounts. Also, the steel tubes should be a snug fit in the bores of the mount. If they aren't, enlarge their diameter with metallic ductwork tape.

http://vwparts.aircooled.net/Late-3-Bol ... -21-bl.htm

The AT's final drive ratio in Fourth is less than 1% taller than the AH because although the R&P is 6% taller, 4th gear is .93 rather than .88.
Most tire choices these days tend to be shorter than the original 165R-15 so it does help a little, but it's not really a "freeway flyer". Stronger than most AHs, though, and the slightly smaller "gap" from 3rd to 4th is nice for highway merging.

[mountainkowboy]

It was in a 70 and already has an early nose cone on it. What are the issues with the bearing? Yea I know, final difference of only like , 0.1, but I will be running a tire that's close to the stock height.

[Henryhoehandle]

The plastic ball seperator on the bearing hits the earlier nosecones. I have seen cases where the bearing was turned over and then the seperator is on 4th gear side and the nosecone can't hit it then.

[mountainkowboy]

Thanks......I will check that out before I install it.

[Henryhoehandle]

You can use a thrust plate and the cage/seperator will clear. Or you can clearance the nose cone..mill, burr bit, etc.

[4flat4]

VW Type 1 113 301 710

[SGT deGroot]

Indeed help please I'm trying to figure out my transmission as I ordered a mount and it's wrong any help please.

As stamped on the case (AH3906705) thanks. The tail for the mount isn't off set but looks like a triangle and the normal mount doesn't fit it.

Any help thanks.

VR
SGT Steven deGroot

[Piledriver]

Indeed help please I'm trying to figure out my transmission as I ordered a mount and it's wrong any help please.

As stamped on the case (AH3906705) thanks. The tail for the mount isn't off set but looks like a triangle and the normal mount doesn't fit it.

Any help thanks.

VR
SGT Steven deGroot

It would help if you posted a pic, or at least stated the year and model of your vehicle..
This site is great for good tech info, but psychic we are not. Usually.

What you describe could just as easily be a T3 transmission, which also comes in the AH flavor and uses a different nose cone, hockey stick and NLA mount.

[Marc]

VW Type 1 113 301 710

Casting numbers are pretty much useless in identifying/dating a transaxle. Need the stamped-in letter/numbers
viewtopic.php?f=50&t=99606

[Marc]

Type III manual transmissions use nosecones that are interchangeable with pre`73 Type I. 113, 131, and 311 nosecones are the same in all basic dimensions, the variations are in the number & location of switches (and of course the early 113s had smaller mount-stud holes and no selector shaft seals). Because the shift coupler is secured from below, the grubscrew divot in the Type III hockey stick is 180° away from its location on a Type I, but the base part is the same shape.
They also have their own designation letters - "DC" is the IRS Type III code, analogous to the "AH" Type I. As in the case of the Type I, the letter code tells very little about the trans beyond its R&P ratio (4.125 in both of these). 1969, 1970, 1971/early 1972, and late 1972 are each unique transmissions which all bear the AH or DC code. To the best of my recollection, the late 1972 configuration of the DC continued through end-of-production (1973 model year)...I had a `73 Squareback but the trans was bad and I put a rebuilt AH in it - can't remember what came out, but it had two sideplates (like a `72).

SGT DeGroot's AH may have had a `73-up nosecone put on it - he didn't tell us if it has two or three holes for the mount. As has been mentioned, the "correct" way to do that requires milling off ~.040" from the gasket surface of the nosecone to make room for a ~$15 aftermarket steel plate that'll provide support for the mainshaft bearing. Most 3-bolt nosecones that have many miles on them are badly hammered at the M/S bearing and need some resurfacing anyway, making this a good place to get rid of the worst of them.

Starting with the AT trans they changed the numbering system to reflect the production date in DD/MM/Y format, but that's of no help on an AH (and I don't have a reference that helps - nor does theSamba).

The variations are:
1969: two drain plugs, early TOB
1970: one drain plug, early TOB but the casting surrounding the input seal has unmachined bosses for guidetube hardware.
1971/early`72: one drainplugs, late TOB w/guidetube and small (16mm) cross-shaft
late`72: one drainplugs, late TOB w/guidetube and large (20mm) cross-shaft.

Internal changes include fine-tooth 3rd and 4th in May of 1970 and the 9-tooth 1st on the latest boxes; these entailed very slight ratio changes (.88 vs .89 4th, 3.78 vs 3.80 1st) which are nearly indetectable from outside.
Again, the primary information provided by the letter code is the R&P ratio; secondary information such as the 4th gear ratio may be discernible in some cases. Almost all pre`73 transaxles have two sideplates, and almost all `73-up have just one - but don't rely upon that for identification because exceptions do exist.

[mads b (dk)]

Dead picture links in post 1.

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