clinebarger
Thread starter
I "Re-Case" 4L60E's with worn Case Lugs, Some Lug wear is acceptable......Got a picture of the Lugs?
How many 3-4 Frictions?
Wide bands need a little more clearance......070"-.080" is good.
There are 3 Bonded Apply Pistons....3-4, Forward, & Overrun. The only piston that has issues is the 3-4 Apply Piston. SAP "HP-Blue" are advertised as an upgrade.
With a Sonnax 4th Servo....
*Install a Sonnax Pinless Accumulator Piston dome toward the case.
*Original 4th Accumulator Spring against the Plate.
*Disregard the TG HD-2 instructions for 4th Accumulator set-up.
With a Sonnax 2nd Servo....
*You will need to add either a Delco or Trans-Go SK Cushion Spring/s in conjunction with the factory 2nd Servo Cushion Spring. The Blue Spring that comes in the HD-2 is better than nothing though!
*Grind/Cut Slots in the Servo Cushion Spring Retainer like TransGo SK-4L60E instructions say....This will clean-up the 3-2 downshift & help eliminate erratic harsh 1-2 upshifts as the ATF can no longer get trapped behind the Retainer allowing the 2nd Servo Cushion Springs to do their job.
2nd Accumulator....
*Purchase Accumulator Housing 24227211
*Use Inner Cushion Spring that comes with the housing.
*Purchase either GM# 24219942 or GM# 24209794 Outer Cushion Spring & install it in the housing.
**Nothing wrong with using the Phenolic Accumulator Piston here, People can say whatever they want....These pistons LAST!!!!
The reason you don't want to use the Pinless Sonnax in the 2nd Accumulator is it cuts the Range of the Accumulator in half causing overly harsh-thumping 1-2 shifts......That's trash on a street driven transmission!
How many 3-4 Frictions?
Wide bands need a little more clearance......070"-.080" is good.
There are 3 Bonded Apply Pistons....3-4, Forward, & Overrun. The only piston that has issues is the 3-4 Apply Piston. SAP "HP-Blue" are advertised as an upgrade.
With a Sonnax 4th Servo....
*Install a Sonnax Pinless Accumulator Piston dome toward the case.
*Original 4th Accumulator Spring against the Plate.
*Disregard the TG HD-2 instructions for 4th Accumulator set-up.
With a Sonnax 2nd Servo....
*You will need to add either a Delco or Trans-Go SK Cushion Spring/s in conjunction with the factory 2nd Servo Cushion Spring. The Blue Spring that comes in the HD-2 is better than nothing though!
*Grind/Cut Slots in the Servo Cushion Spring Retainer like TransGo SK-4L60E instructions say....This will clean-up the 3-2 downshift & help eliminate erratic harsh 1-2 upshifts as the ATF can no longer get trapped behind the Retainer allowing the 2nd Servo Cushion Springs to do their job.
2nd Accumulator....
*Purchase Accumulator Housing 24227211
*Use Inner Cushion Spring that comes with the housing.
*Purchase either GM# 24219942 or GM# 24209794 Outer Cushion Spring & install it in the housing.
**Nothing wrong with using the Phenolic Accumulator Piston here, People can say whatever they want....These pistons LAST!!!!
The reason you don't want to use the Pinless Sonnax in the 2nd Accumulator is it cuts the Range of the Accumulator in half causing overly harsh-thumping 1-2 shifts......That's trash on a street driven transmission!