Those with 4L60-E's, quick q...
05-10-2007, 10:18 PM
#1
Supreme Member
Thread Starter
iTrader: (2)
Join Date: Jan 2002
Location: Moorestown, NJ
Posts: 9,962
Likes: 0
Received 3 Likes
on
3 Posts
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Those with 4L60-E's, quick q...
Quick question...
For those who have 93-95 trucks with the E trans', can the transmission skip gears on up and downshifts? IOW, can it go from 3rd to 1st when you mash the gas or skip a gear when upshifting? I havnt had a vehicle with a 4L60-E in a long time, and I cant remember how it behaved.
The shift control routine only allows the commanded gear # to increment or decrement by one along with the associated change in shift solenoid states, but there dont seem to be any time limits placed on it. It appears that the PCM can change the desired gear number every 40th of a second. There also appear to be routines to determine when a jump shift has ocurred.
I just want to make sure I can see the forest for the trees. The trans code is damn complicated...
For those who have 93-95 trucks with the E trans', can the transmission skip gears on up and downshifts? IOW, can it go from 3rd to 1st when you mash the gas or skip a gear when upshifting? I havnt had a vehicle with a 4L60-E in a long time, and I cant remember how it behaved.
The shift control routine only allows the commanded gear # to increment or decrement by one along with the associated change in shift solenoid states, but there dont seem to be any time limits placed on it. It appears that the PCM can change the desired gear number every 40th of a second. There also appear to be routines to determine when a jump shift has ocurred.
I just want to make sure I can see the forest for the trees. The trans code is damn complicated...
05-11-2007, 08:30 AM
#2
Supreme Member
iTrader: (2)
Join Date: Jan 2005
Location: Hurst, Texas
Posts: 10,119
Received 428 Likes
on
368 Posts
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Those with 4L60-E's, quick q...
I know my 1994 G10 would jump from 4th to 1st when I dropped the pedal doing about 35 mph. 3.08 gears and 6,300 rpm WOT shifts are the reason. I recall it dropping straight from 4th to 1st without going into any other gear.
05-11-2007, 11:39 PM
#3
Supreme Member
iTrader: (1)
Join Date: May 2004
Location: houston
Posts: 2,262
Likes: 0
Received 0 Likes
on
0 Posts
Car: 83 POS monte carlo 2015 chevy P/U
Engine: 92 5.7 tpi 5.3
Transmission: 700r4 6L60E
Axle/Gears: 2.42 too high
Re: Those with 4L60-E's, quick q...
in addition to what Fast said on the down shift, if you nail it from a stop & let off just before the 1-2 shift, it will bypass second & go into third or fourth depending on your rear gearing.
05-12-2007, 12:40 PM
#4
Supreme Member
Thread Starter
iTrader: (2)
Join Date: Jan 2002
Location: Moorestown, NJ
Posts: 9,962
Likes: 0
Received 3 Likes
on
3 Posts
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Re: Those with 4L60-E's, quick q...
Thanks for the replies guys. So I guess with the code Im looking at WYSIWYG.
Thread
Thread Starter
Forum
Replies
Last Post
3.8TransAM
NW Indiana and South Chicago Suburb
1
09-27-2015 08:37 PM
