Click here to visit The FieroStore | View all sponsors
  Pennock's Fiero Forum
  Technical Discussion & Questions
  4t65e-HD 2nd gear issue

Post New Topic  Post A Reply
Email This Page to Someone! | Printable Version


next newest topic | next oldest topic
4t65e-HD 2nd gear issue by 1fast2m4
Started on: 07-04-2013 08:31 PM
Replies: 8 (754 views)
Last post by: cmechmann on 12-08-2018 10:11 PM
1fast2m4
Member

Posts: 513
From: Frederick, MD (U.S.A)
Registered: Feb 2013


Feedback score: N/A
Leave feedback

Rate this member

Report this Post07-04-2013 08:31 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post

From a red light today I took off relatively hard but let out of it before the 1-2 shift, and the car absolutely slammed into 2nd, so hard belts chirped. I immediately pulled over and checked my fluid, doggone, motor mounts all looked good. So I got going again and I immediately noticed the 1-2 shift is VERY soft (VERY SOFT), also if I ease into 2nd then hit the gas 2nd doesn't slip,1st, 3rd & 4th are all fine.


I'm assuming is a **** solenoid or something along those lines, would that be something that can be repaired by just dropping the pan? Or would the trans have to come out. If I need to pull the trans I'll most likely grab a lower mile replacement form the scrap yard.

------------------
1986 SE 3800SC/4t65eHD (12.871@104.96) I'll Sell it if you like
1985 GT 3800SC (swap in progress)

IP: Logged

Formula
Member

Posts: 5294
From:
Registered: Jul 99


Feedback score: (2)
Leave feedback





Total ratings: 96
Rate this member

Report this Post07-05-2013 08:33 AM Click Here to See the Profile for FormulaSend a Private Message to FormulaEdit/Delete MessageReply w/QuoteDirect Link to This Post

clubgp has a decent message board about the transmission:

http://www.clubgp.com/newforum/tt.asp?appid=5

IP: Logged

1fast2m4
Member

Posts: 513
From: Frederick, MD (U.S.A)
Registered: Feb 2013


Feedback score: N/A
Leave feedback

Rate this member

Report this Post07-05-2013 10:20 AM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post

Thanks, I'm still waiting to be approved there. after some Google time I figure the 1-2 Solenoid is shot. none of the gears slip at all even under boost it's just the time betwene 1st and 2nd gear. I'm afriad to make it down shift into 2nd from 3rd in boost because I think that will hurt something.


I'm gonna grab a set of solenoids and a Intense shift kit and see what happens. I think it will stay together till next spring when I turn the power WAY up.

------------------
1986 SE 3800SC/4t65eHD (12.871@104.96) I'll Sell it if you like
1985 GT 3800SC (swap in progress)

IP: Logged

FIEROFLYER
Member

Posts: 3971
From:
Registered: Oct 2002


Feedback score:    (13)
Leave feedback





Total ratings: 178
Rate this member

Report this Post07-05-2013 04:53 PM Click Here to See the Profile for FIEROFLYERSend a Private Message to FIEROFLYEREdit/Delete MessageReply w/QuoteDirect Link to This Post

most likely a solenoid I know the RWD 4L60E trannies have this problem when the piston elongates the bore and fluid gets past it will make for very hard 1 to 2 shifts. Is there any codes being thrown like an 18XX code. Dan

IP: Logged

1fast2m4
Member

Posts: 513
From: Frederick, MD (U.S.A)
Registered: Feb 2013


Feedback score: N/A
Leave feedback

Rate this member

Report this Post07-05-2013 08:23 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post

 
quote
Originally posted by FIEROFLYER:

most likely a solenoid I know the RWD 4L60E trannies have this problem when the piston elongates the bore and fluid gets past it will make for very hard 1 to 2 shifts. Is there any codes being thrown like an 18XX code. Dan



I haven't scanned it because the check engine light isn't on. But I can.

I did get to thinking maybe it was just a sticky solenoid and so I wondered if some snake oil might help it out. I was shocked at how many different bottles of transmission additives there are on the market. I ended up trying a $10 bottle of Zmax transmission additive. I was skeptical if it would even do anything. I took it easy on my 1st drive with the Zmax in and there wasn't much difference still a very sloppy 1-2 shift. After about 5 red lights it really banged into 2nd. Rather than limp it to the shop I decided to ride around town catching red lights, so the zmax could keep flowing through the trans and guess what. it felt better every time it shifts. after about 10miles around town it feels good.

------------------
1986 SE 3800SC/4t65eHD (12.871@104.96) I'll Sell it if you like
1985 GT 3800SC (swap in progress)

IP: Logged

1fast2m4
Member

Posts: 513
From: Frederick, MD (U.S.A)
Registered: Feb 2013


Feedback score: N/A
Leave feedback

Rate this member

Report this Post07-06-2013 09:00 AM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post

Final thoughts on the Zmax I was surprised it did anything, but it's now a fix in a bottle either.

I'm going to order a Set of solenoids off ebay and a Intense shift kit

What I don't want to do is keep driving the car with this sticky solenoid and wind up hurting 2nd gear.

------------------
1986 SE 3800SC/4t65eHD (12.871@104.96) I'll Sell it if you like
1985 GT 3800SC (swap in progress)

IP: Logged

Lou6t4gto
Member

Posts: 7965
From: Ocala, FL USA
Registered: May 2008


Feedback score:    (7)
Leave feedback

Rate this member

Report this Post12-06-2018 03:06 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post

Clubgp you can sign up, then log in, then it tells you that you don't exist ! I've tried to log in to that site in the past and it never works.

IP: Logged

Dennis LaGrua
Member

Posts: 12308
From: Hillsborough, NJ U.S.A.
Registered: May 2000


Feedback score:    (10)
Leave feedback





Total ratings: 312
Rate this member

Report this Post12-08-2018 11:59 AM Click Here to See the Profile for Dennis LaGruaClick Here to Email Dennis LaGruaSend a Private Message to Dennis LaGruaEdit/Delete MessageReply w/QuoteDirect Link to This Post

 
quote
Originally posted by Lou6t4gto:

Clubgp you can sign up, then log in, then it tells you that you don't exist ! I've tried to log in to that site in the past and it never works.


The OP can try the 3800 pro forum. They are accepting new members. Not a Fiero resource but good info there on 3800 engines and 4T65eHD auto transmissions.
3800pro forum

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

IP: Logged

cmechmann
Member

Posts: 884
From: Baltimore Md.
Registered: Dec 2012


Feedback score: (1)
Leave feedback

Rate this member

Report this Post12-08-2018 10:11 PM Click Here to See the Profile for cmechmannClick Here to Email cmechmannSend a Private Message to cmechmannEdit/Delete MessageReply w/QuoteDirect Link to This Post

The shift solenoids should not effect the harshness or softness of the shift. However the pressure force solenoid would. Have in the past on these transmissions, have the force pressure solenoid cause a shutter or harsh 1/2 shift. This solenoid is pulse driven with an accumulator to control system pressure, effecting shift quality. Does the same job as the vacuum modulator on 4T60e, but controlled by the PCM. They will commonly fail the hotter they get. Also GM radiators that have cooler for 4L/T60 and 4L/Y65 series transmissions have issues with debris in the cooler. Normally from the cooler hoses coming apart internally. Being this is a swap, make sure the lines are clear.
Have had some success with the Lucas transmission additives.
If you do replace it, make sure you inspect for any debris in the solenoid bore. Sometimes pieces of the solenoid orings will get lodged in there.

IP: Logged


next newest topic | next oldest topic

All times are ET (US)

Post New Topic  Post A Reply
Hop to:

Contact Us | Back To Main Page

Advertizing on PFF | Fiero Parts Vendors
PFF Merchandise | Fiero Gallery | Ogre's Cave
Real-Time Chat | Fiero Related Auctions on eBay



Copyright (c) 1999, C. Pennock