4T60E Shift Kit 1991-1999, new and ready to install. Fits the 4T60E. Ships fast from the USA.
This is the TransGo SK 4T60E-JR SHIFT KIT, a valve body repair kit for the GM 4T60E, the electronic front-drive four-speed that went behind V6 engines in 1990s Buick, Chevrolet, Oldsmobile, Pontiac and Cadillac cars before the 4T65E replaced it. Owners usually find it after a lockup code, a shudder at light throttle around 40-50 mph, or a rebuilt unit that burned the 2nd clutch again. TransGo lists it for every 4T60E from 1991 on, and the listing is blunt that it will not fit the 3T40, 4T40-E, 440T4, 4T65-E or 4T80-E. If your car is a 1997 or later model, check which transaxle it actually has before you order.
The 4T60E shifts with on/off solenoids, but how cleanly each clutch applies and how smoothly the converter clutch locks is set by valves and accumulators in the valve body. As those parts wear, lockup oil leaks away and accumulator seals and pins wear, so the converter clutch slips and shudders and the 2nd clutch fills slowly enough to burn. The JR kit is TransGo's targeted repair for those wear points rather than a firm-shift performance kit. Per TransGo and the listing it includes:
TransGo lists these complaints for the SK 4T60E-JR:
Rule out the easy causes first. Check fluid level and smell, and scan for codes. A TCC circuit code with an open or shorted solenoid points to the solenoid itself, such as our 4T60E TCC solenoid set, not the valve body. Shudder that appears only during lockup at light throttle, with clean fluid and good circuits, is classic worn lockup valving that this kit addresses. Our TCC shudder diagnosis guide and TCC lockup explainer are written around the 4T65E, but the converter clutch logic they cover descends from this 4T60E design. If the pan holds heavy lining or the car slips in several gears, the kit alone is not enough.
Listed for 1991-1999 here and catalogued by TransGo for all 4T60E units from 1991 on. Confirm you have a 4T60E, not a 4T65E or 440T4, by the transaxle ID tag; our 4T65E identification guide explains how the 4T60 family is told apart. Some 4T60E units use a different converter clutch control setup than others, so send us your year and VIN if you are unsure. We group 4T60E parts with the later unit on our 4T65E and 4T60E parts page.
The listing notes the kit cannot be installed from the lower pan. The valve body sits behind the side cover, and on many cars the work goes much easier, or requires, transaxle removal, so it is best done during a rebuild. Follow TransGo's instruction sheet in order and keep removed valves and springs laid out as they came out. Sonnax's 4T60-E valve body layout is a useful reference for bore locations and worn areas while you are in there. Pair the kit with a fresh 4T60E overhaul kit so every seal is new, and inspect the 2nd clutch pack the kit is meant to protect. Refill with DEXRON-VI, which GM's specification paper notes is back-serviceable into older DEXRON III units.
| Fits | 4T60E 1991-1999 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. TransGo catalogs the SK 4T60E-JR for the 4T60E only. It will not fit the 4T65E, 4T40E, 440T4, 4T80E or 3T40.
It cannot be installed from the lower pan. The valve body is behind the side cover, and on many cars transaxle removal is needed or makes the job far easier.
The JR kit is a repair kit aimed at lockup shudder, 2nd clutch burn-up and accumulator wear, not a performance kit, so shift feel stays close to stock while durability improves.
TransGo lists P0740, P0742, P0756 and P1870, plus no lockup, lockup on top of 2nd and delayed or no 3rd when cold.
DEXRON-VI is GM's current service fill and is backward compatible with older DEXRON III applications like the 4T60E.
