Jakub
Veteran Member
I have a 2006 Vw Jetta Tdi brm 5speed and I’m wanting to lower my 5th gear rpm when on the freeway to get better mpg. Any solid options out there ?
Is it easy to swap ?
Is it easy to swap ?
06 5speed Jetta Tdi manual 5th gear upgrade ?
- Thread starter Jakub
- Start date
JETaah
Vendor , w/Business number
See here
https://www.idparts.com/658-5th-gear-set-p-544.html
I think it's a bit too tall to cruise the streets in 5th gear and there are more in-between stock and this options out there. .681, .718
...or spend a bit more time in fourth gear.
http://pics.tdiclub.com/data/517/21336gearswap.pdf
https://www.idparts.com/658-5th-gear-set-p-544.html
I think it's a bit too tall to cruise the streets in 5th gear and there are more in-between stock and this options out there. .681, .718
...or spend a bit more time in fourth gear.
http://pics.tdiclub.com/data/517/21336gearswap.pdf
Last edited:
I swapped to a .658 5th this summer. Was not a hard swap, just follow the excellent guide posted above. Take your time, and heat the gears up. With heat, they will just pop right off.
It did make for a large jump from 4th to 5th. Would have not gone with .658 if I was on stock power, or did much city driving. You will be revving 4th out more, or lugging 5th in the 50-60mph range. I was previously shifting to 5th around 45-50, but now shift around 60. 3000rpm has me running 100mph, 2000rpm at 70mph.
I did the swap for a quieter cabin, and lower engine rpm. I have not seen a drastic increase in MPG. Maybe 1-2mpg if cruising <80. Anything over that and the air resistance seems to cancel any gains from lower rpm.
It did make for a large jump from 4th to 5th. Would have not gone with .658 if I was on stock power, or did much city driving. You will be revving 4th out more, or lugging 5th in the 50-60mph range. I was previously shifting to 5th around 45-50, but now shift around 60. 3000rpm has me running 100mph, 2000rpm at 70mph.
I did the swap for a quieter cabin, and lower engine rpm. I have not seen a drastic increase in MPG. Maybe 1-2mpg if cruising <80. Anything over that and the air resistance seems to cancel any gains from lower rpm.
Jakub
Veteran Member
Thanks for all the information