I recently purchased a 500 buck auto shift on an online auction. From what I understand they are essentially a traxter with JD garb. The machine is fairly clean and doesent look to have been abused. It starts and idles fine however it won’t shift out of first and tends to bog down when trying to accelerate it. Now I researched some past forums on buck shifting issues and first thing people seem to replace is the GBPS. I just replaced that and it solved nothing. Now I should mention the first day I had the machine it shifted and accelerated ok on manual but autoshift hardly worked at all. Also the tach was dead from the get go and does not register rpm and the hours are stuck in one spot. The other indicator lights on the tack funtion as they should though. Now my main question is would replacing the tach possibly solve these shifting issues or some other sensor on the machine? I’ve also read elsewhere that replacing the TPS sensor may help. Is this on the carburater? And how do you calibrate a buck? There’s no plug in I could see for a jumper wire like on the traxter. This is a decent looking machine with excellent compression and can hardly believe it to be a mechanical problem. Would really appreciate any input from anyone with experience repairing these.

I recently purchased a 500 buck auto shift on an online auction. From what I understand they are essentially a traxter with JD garb. The machine is fairly clean and doesent look to have been abused. It starts and idles fine however it won’t shift out of first and tends to bog down when trying to accelerate it. Now I researched some past forums on buck shifting issues and first thing people seem to replace is the GBPS. I just replaced that and it solved nothing. Now I should mention the first day I had the machine it shifted and accelerated ok on manual but autoshift hardly worked at all. Also the tach was dead from the get go and does not register rpm and the hours are stuck in one spot. The other indicator lights on the tack funtion as they should though. Now my main question is would replacing the tach possibly solve these shifting issues or some other sensor on the machine? I’ve also read elsewhere that replacing the TPS sensor may help. Is this on the carburater? And how do you calibrate a buck? There’s no plug in I could see for a jumper wire like on the traxter. This is a decent looking machine with excellent compression and can hardly believe it to be a mechanical problem. Would really appreciate any input from anyone with experience repairing these.