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4L80E missing 4th gear, no codes
Hi folks, this tranny came in with no 4th and no 3rd gear. They pulled the trans out before checking some pressures or codes. During overhaul I found worn clutches and a badly worn pump. So I was sure the worn pump caused a loss of line pressure and that kille... Login to read more. ![]()
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| Engine | 6.5 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1997 GMC C2500 Sierra SL 6.5L
| Engine | 6.5 L |
| Trans | 4-speed Automatic (Electronic) |

1 Replies Received
1 Replies Received