The cover is only mandatory when the truck(2 or 4wd) is operated on dirt or stone roads or areas. It protects the flexplate from rocks and debri. I've never used a cover and have never had any problems on the street. Plus my tranny guy said that it'll help cool my 10" converter.
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86 SWB 9.0 LITER
T-400-OD 4.11 eaton-4/5 drop
Best 1/4 12.51 @112mph no traction
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