Chevy / GMC Allison MT640 / MT643 / MT650 / MT653 Overhaul Kit
New old stock Precision International K64900A overhaul kit. Bag stamped AT640, 643, 650, 653 1972-UP — that is Precision’s Allison 640-series stamp for MT640 / MT643 / MT650 / MT653, not AT540. Inner pack is RING KIT 230114632 (Allison 23014632 PEEK sealing rings). Paper gaskets, rubber, O-rings, lip seals, metal-clad seals, and the ring kit. The main gasket is sandwiched between two cardboard sheets. Gasket and seal kit only — no clutches, steels, or filter.
Years / applications
- Allison MT640 / MT643 / MT650 / MT653 1972–1993
- Chevrolet / GMC medium-duty C50–C70, C60, C65, C70 1972–1993 with MT640 / MT643 / MT650 / MT653
- Chevrolet B60 / GMC B6000 school-bus chassis 1979–1991 with the optional Allison MT-643D (Detroit Diesel 8.2)
- Chevrolet Kodiak / GMC TopKick through 1993 with MT640 / MT643 / MT650 / MT653
Does not fit
- Allison AT540 / AT542 / AT545 (different, lighter unit — this kit is not for those)
- Allison MT644 / MT647 / MT654 (Precision K64900B)
- Allison 1000 / 2000 / 2400
- Master rebuild kits with friction and steel plates — those are not in this bag
NOS. Opened only to photograph. Main gasket kept between the cardboard. 30-day returns. Buyer pays calculated USPS. Ships 23x16x1 in, 2 lb 9 oz, USPS parcel.
