FN tranny 5th gearset swap possible? - General - VWDiesel.net The IDI, TDI, and mTDI source.

• FN tranny 5th gearset swap possible? by chiefdiesel on 26 Feb, 2009 07:18
• Will the .65 or .68 5th gearset work in a FN coded tranny from an '81 Jetta?
• #1 by 8v-of-fury on 26 Feb, 2009 12:07
• Quote from: "chiefdiesel"

  Will the .65 or .68 5th gearset work in a FN coded tranny from an '81 Jetta?

  
  
  Which trans is the gear set out of? If it is out of another 020 then it should work.
• #2 by blkboostedtruck on 26 Feb, 2009 14:47
• where you getting this from? i'm curious! i never heard of those ratios for a 5th!
  Duane
• #3 by Dr. Diesel on 26 Feb, 2009 16:39
• I have a .75 020 fifth set for sale if you're interested.
• #4 by jtanguay on 26 Feb, 2009 16:52
• Quote from: "blkboostedtruck"

  where you getting this from? i'm curious! i never heard of those ratios for a 5th!
  Duane

  
  
  click here and be amazed
• #5 by chiefdiesel on 26 Feb, 2009 18:53
• This tranny currently has the .75.  I want the tallest gearset possible for the FN 020
• #6 by 8v-of-fury on 26 Feb, 2009 18:57
• Quote from: "chiefdiesel"

  This tranny currently has the .75.  I want the tallest gearset possible for the FN 020

  
  
  The 020 FN came with the .71
  
  the difference between the .71 that you have, and the .68 or .65 is less then 200 rpm's and like $350
  
  why not stay with the .71?
  
  65 mph will run you 2500 rpm, right where you want to be
• #7 by foxracer1 on 26 Feb, 2009 22:08
• Some FN's came with a .75 depends on the exact build date.
• #8 by zukgod1 on 27 Feb, 2009 07:22
• Quote from: "jtanguay"

  Quote from: "blkboostedtruck"

  where you getting this from? i'm curious! i never heard of those ratios for a 5th!
  Duane

  
  
  click here and be amazed

  
  
  Those are for the TDI trans. Not the 020.
  I cant remember the codes but it's like a 02J or something, cable shift trans.
• #9 by 8v-of-fury on 27 Feb, 2009 09:29
• Quote from: "foxracer1"

  Some FN's came with a .75 depends on the exact build date.

  
  
  my bad.. lmao
  
  Still tho the diff between .75 and .71 is next to nothing and is it really worth the time and effort?
• #10 by jtanguay on 27 Feb, 2009 10:11
• Quote from: "zukgod1"

  Quote from: "jtanguay"

  Quote from: "blkboostedtruck"

  where you getting this from? i'm curious! i never heard of those ratios for a 5th!
  Duane

  
  
  click here and be amazed

  
  
  Those are for the TDI trans. Not the 020.
  I cant remember the codes but it's like a 02J or something, cable shift trans.

  
  
  

  Quote

  This works with all manual transmission VWs from 1996 to the present, as well as many older models.

  
  
  1996 vw's came with an 020 transmission.  except passat TDI's with the 02A transmission?
  
  i'm pretty sure it would work with any 020 5 speed box, but maybe someone can confirm for sure?
• #11 by blacknoise on 03 Mar, 2009 20:11
• Those .65, .68 5th gear sets are for a european gearbox application which uses the same shaft design as the 02A and 02J boxes.  That is why they work for those gearboxs.  Not compatible with the old 020.  Swapping a 020 5th gear is intensive and as said previously, the RPM drop isn't huge.  I considered it when I put a gasser box in my '90 Jetta diesel. Decided it was too much to swap gear sets for an extra 100 RPM drop or whatever.  That tranny swap was totally worth it w/o messing with it's innards.   I installed a .658 on my 02A CNT trans (sourced: 97 Passat TDI) for my 86 Golf TDI epic and this gear swap is pretty easy making it worth it in my view.  
  
  -B
• #12 by Dr. Diesel on 04 Mar, 2009 04:17
• Quote from: "blacknoise"

  for an extra 100 RPM drop or whatever. -B

  
  
  My rabbit's 020 with a .71 5th runs 2350rpm at 100km/h (60mph)
  That'd be 2491rpm with a .75 fifth.
  
  Very worth it.
• #13 by foxracer1 on 04 Mar, 2009 04:49
• The 5th swap is easy on an 020. I used a gasser box with a .75 5th. we'll see how she runs.