Gm Th400/475 (3l80/3l80hd) Powerpack® Intermediate (second) Clutch Pack Hi-performance, Racing, Drag Boats, Street Rods Kolleen Steels
5 in stock
FOR TECHNICAL SUPPORT , CORE RETURNS , BULK SHIPPING OPTIONS , LOCAL PICKUP OR DELIVERYS SE HABLA ESPANOL CALL 561-619-0520 NOW 24/7GM TH400/475 (3L80/3L80HD) PowerPack®
Intermediate (Second) Clutch Pack
Hi-Performance, Racing, Drag Boats, Street Rods
ALTO PART #031757HP
Alto # 031757HP POWERPACK® CONTENTS:
(4) 031742A (.062” / 1.57mm) Red Eagle® Frictions
(4) 031715HK (.076” / 1.93mm) Steel Plates
(1) 028252-106 (.106” / 2.69mm) Heavy Duty Snap Ring
Transmission 400 (3L80)
Diagram below shows Alto powerpack location in the unit highlighted in yellow:
Click anywhere on Diagram to enlarge in new tab/window.
Also use the diagram below for parts reference, we can supply any part shown just tell us the 3 digit number and we will get you a quote.
Note: Always pre-soak friction elements for at least 15-20 minutes in manufacturer recommended ATF.
DURABILITY AND PERFORMANCE BENEFITS:
The 031757 kit will correct, prevent and substantially reduce the concerns of 1-2 up-shift shudder, long
slide with a tail bump or bang, provides a safety increase from wrong gear starts, case lug breakage,
allows reuse of a slightly worn case (lugs). The 031757HP kit offers the same benefits of the 031757
kit, however, the additional flat steel plate furnished in the kit eliminates the bottom waved cushion
plate. This allows for a much shorter 1-2 up-shift in hi-performance and racing applications.
PLEASE READ THIS BEFORE PURCHASE & BEGINNING INSTALLATION!
For complete customer satisfaction, please read the technical Description 95% of all Orders Ship Same Business day all others Ship within 1 Business Day. and the differences between
the 031757 and the 031757HP kits. Since the 031757HP kit is furnished with an additional flat steel
plate which eliminates the waved cushion plate, misuse of the product can result in customer
FOR THE 031757HP KIT: This kit is furnished with an additional FLAT steel plate which allows the
product user to eliminate the original (or replacement) waved cushion plate. Important Technical
Note: It is our recommendation that the 031757HP kit should only be installed in Hi-Performance or
racing applications where the vehicle owner wants additional firmness from the deletion of the waved
INSTALLATION INSTRUCTIONS FOR THE 031757HP KIT:
Discard the waved cushion plate. Install the additionally furnished .076” flat
steel plate followed by the four (4) thin friction plates and remaining three (3) steel plates.
Install the top
pressure plate. When installing the heavy duty snap ring, do not position the snap ring end gap in the
open, non-lug area of the case.
Air check the clutch pack several times to seat all the components.
Check the overall clutch clearance between the top of the friction plate and the bottom of the pressure
plate or check between the top of the pressure plate and the bottom of the snap ring.
The overall clutch
clearance should be a minimum of .020” to a maximum of .050”. Be sure to presoak the friction plates
in clean ATF for at least fifteen minutes before final assembly.
Technical Notes and Tips:
Prior to installing the top pressure plate, check it carefully for flatness.
This procedure is called Flat Sanding and can be used for all components that should be
flat and parallel.
Using a 12” x 12” square section of SAFETY glass (not pane glass) place the glass
section in your solvent tank.
Place a section of fine to medium grit emery or aluminum oxide paper on
top of the glass section. Place the top pressure plate on the paper.
Start the solvent tank pump and
direct the flow of solvent over the plate.
This will help to flush the paper of residual grit which will cause
the paper to quickly clog.
Push down with moderate force while you drag the pressure plate back and
After about a dozen strokes, turn the pressure plate over and if the sand scratches cover the
entire flat surface of the pressure plate, you’re done.
If not, give it another dozen or so strokes back
and forth across the paper.
A few minutes spent performing this procedure will save you from
experiencing a possible shudder concern from a bowed pressure plate.
Lastly, check the outer
perimeter of the pressure plate where it contacts the main case and the bottom of the snap ring for any
sharp edges which could cut into the main case or top snap ring.