Tranny Swap, opinions please - page 3 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• #30 by zukgod1 on 08 Dec, 2008 12:07
• Quote from: "theman53"

  http://www.ryanrupp.com/album/webpics/02Aswap.pdf
  
  I want to do this someday...maybe you can tell me how it goes

  
  
  
  
  Linky no workie..  
• #31 by theman53 on 08 Dec, 2008 15:12
• Dang!
  That was the link that showed pretty much a step by step install of an 02A six speed manual swap into a much older chasis. I don't have anyother link to it. Maybe in a couple years I will do it anyway and show it then  :lol:
• #32 by 8v-of-fury on 08 Dec, 2008 16:22
• Quote from: "Quantum TD"

  
  
  Bad idea here. If grunt is what you want, I'd say try to find an AVX and swap in a .71 5th. That will give you plenty of grunt around town, and an overdrive 5th on the highway. The 4.25 R&P really keeps power at the pedal.
  
  The AWY and the 4K are essentially the same trans, and you'll be out of gears by the time you hit 55-60 MPH. That's not a good idea for motor longevity.

  
  
  with the 4K at 60-65 Mph the engine will sit at a very comfortable 3100-3350 RPM.. and thats before my plans to swap a .75 in to it..
  
  4K-> 3.94    3.45    2.12    1.44    1.13    0.89
  
  I will be able to use each bit of all the four gears around town and even cruise around in 5th. Sure the AVX would be much better for the REAL grunt.
  
  AVX->      4.25    3.45    1.94    1.29    0.91    0.75
  
  This trans.. at the same speed only lowers the rpm 300.. and in all the other gears the difference in speeds between the two trans (AVX and 4K) is next to none (+- 4-5). Not to mention i've never heard of anyone using an AVX lol..
• #33 by Quantum TD on 08 Dec, 2008 23:34
• Quote from: "8v-of-fury"

  
  with the 4K at 60-65 Mph the engine will sit at a very comfortable 3100-3350 RPM.. and thats before my plans to swap a .75 in to it..
  
  4K-> 3.94    3.45    2.12    1.44    1.13    0.89
  
  I will be able to use each bit of all the four gears around town and even cruise around in 5th. Sure the AVX would be much better for the REAL grunt.
  
  AVX->      4.25    3.45    1.94    1.29    0.91    0.75
  
  This trans.. at the same speed only lowers the rpm 300.. and in all the other gears the difference in speeds between the two trans (AVX and 4K) is next to none (+- 4-5). Not to mention i've never heard of anyone using an AVX lol..

  
  
  True about the RPMS difference, but 3300 is not very 'comfortable' for a motor with a 4500 max RPM.You're still in the power band, looking for another gear at 3300 RPMS. 300 RPMs is a big difference when you're talking about winding out at 57 MPH vs. 65 MPH. It's all relative, I understand. I don't need a tach to tell me that my motor is straining and killing my MPG. So, when I hit 55 and the motor is screaming with a 4k/2h, I'm not really gonna push the envelope to see how long my car can withstand that kind of torture.
  
  One of my recent cars was a 1991 Jetta Coupe with an AWY. I drove it from CT to TN. I never went past 65 MPH, cos' the motor was begging for mercy.
  
  As for the .75 swap: yes, you'll be able to bang thru the gears around town, but look at the 4th to 5th change when you compare the AVX to the 4k. It would almost be like shifting from 3rd to 5th in the AVX, if you were to put a .75 in your 4K.
  
  It's all about what you want out of your car. If you want to roast Ricers with fart cans, then put on the AWY or the 4K and get 36-39 MPG. If you swap in the .75 and do a lot of highway drving, then you'll improve that number.
  
  If you want to drive like most 'normal' people, and get 45-55 MPG, then go with the 'good' transmissions (AOP, AGS, ACH, 7A). If you think you can have the best of both worlds, then try the .71 or .75 5th swap on a low-geared trans.
  
  I'm not preachin', just giving my own real-world experience. Obviously, if you have a 1.6NA, the ideal would be a 4k/AWY with a 6th gear. Not all can afford that luxury, or are willing to swap in an 02A just for a 1.6NA, so we're left with what was produced. Might as well make the best of a less-than-ideal situation.
• #34 by overdrivegear on 09 Dec, 2008 08:03
• Quote from: "Quantum TD"

  
  
  FF, FO, FN: These are a nice fit for the 1.6NA (3.89 R&P and .71 or .75 5th). Unfotunately (as some note), they won't fit into a MK2 or later. The gearing on these is really well-suited for both 1.6 NA and TD applications.
  
  

  
  
  Why can't you put an FF in a MK2 car?  What have people said about that?
  
  I have a new project 85 Golf with the ACH and I want to put in the FF from my 81 rabbit...or would it be better to take the .71 fifth from the FF and put it on the ACH for the 7A 'CLONE'?
• #35 by zukgod1 on 09 Dec, 2008 08:21
• The FF has a different rear mount. There are no boss's for the mk2 rear mount to attach to.
• #36 by arb on 09 Dec, 2008 09:06
• If you want to use a FF like I am, you could make your own mounts like I am.
• #37 by zukgod1 on 09 Dec, 2008 10:08
• Quote from: "arb"

  If you want to use a FF like I am, you could make your own mounts like I am.

  
  
  I almost did that then I discovered there are 2 different FF's and I wasn't sure which one I had so I did the ACN instead.
  
  I still haven't looked to confirm which one I actually have. Maybe tonight.
• #38 by arb on 09 Dec, 2008 10:31
• Quote from: "zukgod1"

  
  I almost did that then I discovered there are 2 different FF's and I wasn't sure which one I had so I did the ACN instead.
  
  I still haven't looked to confirm which one I actually have. Maybe tonight.

  
  What ? 2 different FF's ?  Interesting. Mine has the differential mount facing the passenger side - it is bolted to the housing with 2 studs. If it wasn't snowing last night and rain/snow tonight, I've have photos already...
• #39 by zukgod1 on 09 Dec, 2008 10:50
• FN, FF, FH (most to 7/80) .76 5th gear
  FN, FF, FH, FJ (most from '81) .71 5th gear
  
  Both have the same R&P
• #40 by arb on 09 Dec, 2008 11:00
• Quote from: "zukgod1"

  FN, FF, FH (most to 7/80) .76 5th gear
  FN, FF, FH, FJ (most from '81) .71 5th gear
  
  Both have the same R&P

  
  
  I remember reading that now.... thanks ! I don't know what year my tranny is - the engine is an 82.5 so maybe I have the taller overdrive.
• #41 by zukgod1 on 09 Dec, 2008 11:49
• I'm hoping mine is the taller one so I can take the 5th .71 out and toss it in my AWY.
• #42 by 8v-of-fury on 09 Dec, 2008 15:10
• Quote from: "Quantum TD"

  
  
  I'm not preachin', just giving my own real-world experience. Obviously, if you have a 1.6NA, the ideal would be a 4k/AWY with a 6th gear. Not all can afford that luxury, or are willing to swap in an 02A just for a 1.6NA, so we're left with what was produced. Might as well make the best of a less-than-ideal situation.

  
  
  Yes ideally the best would be a 4K with a 6th gear I didn't mean to sound offended or lippy but you are right i am making the best of a less than ideal situation. I wish to maintain the quickness around town and with the .75 or .71 that jump from 4th to 5th gear will be a little sacrifice to pay for being able to have the best of both worlds.
  
  Also for now (before the 5th gear swap) at around 3050-3150 rpm, 60-65 mph is just fine for me highway wise.. AND i will still be able to use 5th around town
  
  If im swapping in an N/a im expecting to be a little slower.. besides why do i need a reason to speed? if the car won't go that fast i will never get a ticket.. lol
  
  all about the mindset Maybe one day.. i will have one of the 'good' trans mated to a TD for optimum performance