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turbo issues

702 Views 6 Replies 5 Participants Last post by  99cummins310, 
SmokeDreams
My friend has a 99 2500 5 speed 2wd extended cab longbed and called the other day saying that in 5th gear he was running 2200 rpms at 65 mph when normally he would be at 75. He said his truck was louder than usual and he couldnt hear his turbo like he normally could and didnt seem to have as much power.

He said he could down shift and then it would spool but cruising it wouldnt spool like normal.

I told him to check shaft play and look for leaks in the boots.

Any other ideas why this would be going on?
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M
If it turns out the clutch is in fact slipping, that could also account for the lower boost. With a slipping clutch you can't load the engine as much, so you won't see as much boost.
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