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Q: transmission problem on 1998 Chevrolet Lumina

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
My transmission is slipping when I put it in reverse and than when I put it in overdrive are any of the forward gears, but does fine at high speeds and low speeds after a few minutes, what can it be.It has a transmission code PO1870 to
when was the last time it was serviced?? sounds like a seal issue but could be a partially clogged filter. if you have been driving for a while like this, damage may have been done internally.

A code P1870 usually indicates torque converter slippage. If you bring your car over to Mr. Transmission on I-10 East (713-455-1780)or on Antoine (713-683-0700), we will check it out for free and tell you what needs to be done.
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