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Our mechanic called. When he hooks it up to his computer it shifts fine. So we have ordered a new computer. It will be here in 5 days . We are hoping that does the trick.

When we bought the bus it did not shift into overdrive. Speedometer ran high. Of course this was not told to us at purchase. We thought getting transmission rebuilt would solve the problem. It has done nothing. The mechanic who rebuilt the transmission says I do not know what else to do. We...

99 chevy p30 chassis

Thank you for all of this. You are so helpful. We just put in a new drac that fit our gear ratio and tire size. Kept the old one just in case and that did not solve the problem. I am not sure about the obd1 or 2 you mentioned. We just took it to a mechanic today to start troubleshooting as the...

We have had transmission rebuilt. Still will not shift into overdrive. Also speedometer reads high 70 when only going about 40. We replaced the drac but nothing. We have not had it read for codes because none of our mechanics have the hookups. We are dumbfounded!!!