Would like to change first gear in a 4L60E
#1
Would like to change first gear in a 4L60E
Does anyone make a different ratio first hear for the 4L60E?
I'm not a big fan of the 3.06:1 first gear ratio and would like to get closer to a 2.8:1 or 2.7:1.
I know that different ratios have been made for other transmissions and didn't know if anyone made the for the 4L60E.
Any input would be appreciated.
Thanks
Craig
I'm not a big fan of the 3.06:1 first gear ratio and would like to get closer to a 2.8:1 or 2.7:1.
I know that different ratios have been made for other transmissions and didn't know if anyone made the for the 4L60E.
Any input would be appreciated.
Thanks
Craig
#2
Moderator
A different 1st and 2nd gear ratio is available; I have it in my car now.
1st is 2.84 and 2nd is 1.57.
It is implemented with a custom billet 6-pinion front planetary set.
IIRC FLT has it as an option on their Level-7 for an additional $1200.
PATC also sells it.
1st is 2.84 and 2nd is 1.57.
It is implemented with a custom billet 6-pinion front planetary set.
IIRC FLT has it as an option on their Level-7 for an additional $1200.
PATC also sells it.
#4
Moderator
Sorry, I don't have track times before and after; for one thing I rarely can get my car to hook well and therefore my ET is very inconsistent. Also I made too many engine/tuning changes to compare trap MPH before and after.
#6
Moderator
At 600rwhp you really should be considering a 4L80E which has a 2.48 1st gear which will help you hook at the start. Of course mostly for its greater strength and durability.
I do like the closer ratios in my 4L60E in street driving; mostly it was part of my goal to experiment with all the significant aftermarket parts for this trans. Just a hobby for me.
I do like the closer ratios in my 4L60E in street driving; mostly it was part of my goal to experiment with all the significant aftermarket parts for this trans. Just a hobby for me.