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General Information => General => Topic started by: Justin on December 19, 2005, 09:45:40 am
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Here is the code stamped on the flat pad where the trans code is located
4A12014
I cannot find this code anywhere on the net all i can find are the GC's GP's and the three letter codes that begin with A
this is a four speed and I am trying to see what the gear ratios are to see if I want to mate it up to my turbo engine
Thanks
Justin
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a lot of times the trans code is printed on a sticker in the trunk.
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a lot of times the trans code is printed on a sticker in the trunk.
:? That doesn't help if it's not in a the car, or if someones already swapped it....
But just from your number, it looks like you have a code 4A transmission, manufactured on December 1st, 1984
http://www.bentleypublishers.com/product.htm?code=vfa1 shows the existence of a 4A transmission.
http://www.scirocco.org/gears/ doesn't include a 4A though -- only G codes for the 4 speeds. Hmmmmmmm.
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ya its a tough one thats why i suggested checking the trunk sticker. sounds like it might be from his '84 diesel?
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4A is indeed a valid code for a 1984 Rabbit 4-speed transmission. Actually, VW technically marketed this one as a "3+E" Meaning 3 speeds plus "economy" gear. You may have noticed the fourth gear is labeled "E" on the shift knob. :lol:
The 4A is a very desirable transmission for a high powered daily driver turbo-diesel application. The 4-speeds has gives wider gear spacing than the 5-speeds, making for less time spent "rowing through the gears". It is best coupled with an engine having a broad and flexible powerband (perfect match with a VNT or other small, quick-spooling turbo.) The 4-speed package weighs about 20 lbs less than a 5-speed.
Its ring and pinion (3.94 ratio) combined with its 4th gear (.70 ratio), makes it very well suited for a low-RPM turbo-diesel highway cruising application. It has nearly an equivalent top gear ratio to the popular for turbo-diesel "FF" 5-speed model (.71 fifth with 3.89 R&P).
Also, it being an '84 (the last of the 4-speeds) means it has some extra features and flexibility not found on any other 4-speeds. It has the spring-loaded brass shim "mini slip" output flanges (identifiable by green seal cover on passenger side output flange), which allow it to be upgraded with peloquin's 40% and 80% shim upgrade LSD kits:
http://www.peloquins.com/products_80.html
The '84 case also comes with extra mounting holes making it about the only 4-speed that can be swapped into an A2 or later VW. :)
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when i got my '82 with FF gearbox the shift knob had a 4+E pattern... that sound normal to you jake?
(thanks for the info on the 4 speed, good stuff)
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Thanks guys that helps a lot, I will probably use it instead of the 5 speed that i have then since the 5 speed is the 1980 version and i think that its the .76 to 1 overdrive which this 4 speed will give me less shifting, quicker and better overdrive
perfect for the slightly modded turbo diesel that should be on the road by new years
Thanks a lot guys, now I have another one for you, have you ever seen a 4 speed transaxle that has no stamping on the flat pad?? I have 2 of them
later
Justin
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4A is indeed a valid code for a 1984 Rabbit 4-speed transmission. Actually, VW technically marketed this one as a "3+E" Meaning 3 speeds plus "economy" gear. You may have noticed the fourth gear is labeled "E" on the shift knob. :lol:
The 4A is a very desirable transmission for a high powered daily driver turbo-diesel application. The 4-speeds has gives wider gear spacing than the 5-speeds, making for less time spent "rowing through the gears". It is best coupled with an engine having a broad and flexible powerband (perfect match with a VNT or other small, quick-spooling turbo.) The 4-speed package weighs about 20 lbs less than a 5-speed.
Its ring and pinion (3.94 ratio) combined with its 4th gear (.70 ratio), makes it very well suited for a low-RPM turbo-diesel highway cruising application. It has nearly an equivalent top gear ratio to the popular for turbo-diesel "FF" 5-speed model (.71 fifth with 3.89 R&P).
Also, it being an '84 (the last of the 4-speeds) means it has some extra features and flexibility not found on any other 4-speeds. It has the spring-loaded brass shim "mini slip" output flanges (identifiable by green seal cover on passenger side output flange), which allow it to be upgraded with peloquin's 40% and 80% shim upgrade LSD kits:
http://www.peloquins.com/products_80.html
The '84 case also comes with extra mounting holes making it about the only 4-speed that can be swapped into an A2 or later VW. :)
Good info Jake, do you have the gear ratios for this box, it seems to be a rare bird and hard to find info for. Also, I've heard that the other 4-speeds arent that strong, but if the 4A has the "mini-slip" parts built in, perhaps it's as strong as an 020. Thanks!
Brendan
84 Scirocco 8v
00 Camaro L36 M49
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when i got my '82 with FF gearbox the shift knob had a 4+E pattern... that sound normal to you jake?
It is plausible, although just a little bit odd because my '81 Rabbit came with an FF, and it had a 1-5 gear pattern printed on its shift knob. Oh well, the "E" gear is just semantics anyway.... :wink:
Good info Jake, do you have the gear ratios for this box, it seems to be a rare bird and hard to find info for.
I believe my '84 Rabbit owner's manual has the ratios listed. But I don't have easy access to it right now. If you're willing to dig, I know they are in ETKA, listed along with each gear. :o
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Oh well, the "E" gear is just semantics anyway.... :wink:
when i put the TD motor in i switched the shift knob from the 4+E to 5-sp because then i could actually accelerate in 5th. :lol:
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Heh, had to format and re-install my pc, never got around to installing ETKA again until just now. :) Figured out the ratios:
1st: 3.45
2nd: 1.75
3rd: 1.06
4th: .70
3.94 final as Jake mentioned. :)
Brendan
84 Scirocco 8v
00 Camaro L36 M49
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Thanks for the ratios, they are greatly appriciated
what is Etka, and can it be made readily avaliable??
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you have to work at a dealership parts department to use ekta. :wink:
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Thanks Brendan. By the way this is what I've got in the VNT Rabbit! :P
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Nice. Yeah, I did a bit of searching in the yards around here and there seems to be a few around for cheap. Also, if the ring and pinion are interchangeable with other 020 boxes, I found by running a simulation with my "fantasy" TD Scirocco I got a much quicker 0-60 and 1/4 mile time by swapping in the 3.67 ring and pinion that nearly every other 020 box has. And, with the tire size that I plan to run, puts me at around 2760 rpm in 4th at 75 mph. ;) Acutally, I pretty much tested every gearset that VW offers in 5-speeds and this 4-speed combination (with the 3.67) beats everything else. :)
Wonder how much torque they can handle? :twisted:
Brendan
84 Scirocco 8v
00 Camaro L36 M49