98 4L60E billet servo - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-30-2004, 04:24 PM
Registered User
 
Join Date: May 2004
Location: Canada
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Question 98 4L60E billet servo

I recently tried the Sonnax 2nd gear corvette and 4th gear billet servo on my GM 98 K1500's stock 4L60E. There are no modication (internal or re-programming) done to the 4L60E except it has the B&M ShiftPlus Electronic Module. It works great with the factory servo and the shift points are at factory setting. After I changed the servo, with stock pin length, at part throttle, it shifts 1 to 2 at 3500 RPM. At full throttle, it shfits 1 to 2 at 5500 RPM. The shift quality is not as firm at the factory servo. Then I grinded the pin tip down ~ 0.060". Shift points did not change (~3500 RPM at part throttle) and it had a hard time to go into 4th. It showed code P0751 (Shift solenoid A performance or stuck off). The above road tests were performed with the B&M ShiftPus at all three settings with same result. Today I removed the new servo and reinstalled the factory servo. Everything is fine again. Shift points back to factory, and shift quality is firmer, no trouble code. I don't believe the servo would change the shift points. Any input or tip would be helpful. Thanks in advance.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-30-2004, 04:46 PM
Crosley's Avatar
Hotrodders.com Moderator
 
Last wiki edit: T-350 rebuild tech
Last journal entry: Bar under the dash
Last photo:
Join Date: Nov 2002
Location: ... USA
Posts: 8,099
Wiki Edits: 1659

Thanks: 340
Thanked 102 Times in 98 Posts
Cool

I have the same setup in my 2k Silverado truck. usually you have to space the servo IN to reduce band clearance, not grind the pin down. there is a spacer from TransGo that I use under the billet OD Sonnax servo. I have over 50k miles on my setup.

With the vette servo the PCM will engage the torque management part of the programing. The shift quality at WOT with the vette servo will drop way off when the computer cuts the engine timing to zero. GM uses this torque management programing to save the tranny from full power during shifts at WOT

I do not have any electronic modifiers on my truck.

you might a get a trouble code for solenoid A since it comes "ON" for the OD shift.

__________________
I gotta sign this too?

Tony
__________________
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 04:10 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.