Allison Transmission Questions Hello again allisonman, I wrote a couple months ago about some problems with the tranny in my pickup. Well the other day I took it to the local Chevy dealer and told them what it was doing and asked them to check the valves and solenoids. All they did was run the computer on it and call me to say that nothing was wrong with it because there was no codes. Well I told them to put it in to tow\haul and step on the gas pretty hard going up a hill and they would know what im talking about. So they called me back and said, yep its messed up allright. They told me that it gave them the code PO733 and that they called the tec line and they were told that c1 thru c4 are going out and the reason it only happens in tow\haul is because it is still in the early stages of going out. Well they gave me some prices on a overhaul and on a allready rebuilt one. around $4000 for both. Both were way to expensive for me. So my question is. Is there an aftermarket clutch kit that I can buy for a halfway decent price and also a very detailed overhaul book for the allison 1000. Or should I get a second opinion from a different trans shop? By the way, the trans has 140,000 miles on it. That dont seem like alot for an allison. PS. Now I can feel it sliping with out it being in T\H and when going from reverse to drive. Thanks for any advise.