Dont know where to post this so here it is...
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Joined: Jul 2006
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From: Ellicott City,MD
Dont know where to post this so here it is... I have rebuilt 4l60e w/3600 vig, s60 w/ 3.73's, and 40,000 miles on my 00 t/a. Ive had the rear for almost a year and the trans for about 8 months and its been running fine. This week Ive noticed the rpm's are at 3000-3500 cruising at 70mph.. it sounds like a lot of stress on the engine and if i recall correctly before they were at 2000-2500 around that speed. also if i accelerate slow then get into the gas I feel like i'm driving a v6. Ive found a small leak in the rear end seal and a small crack in the coolant line from the radiator to the water pump. but my water temp., trans fluid, oil pressure, and oil levels are fine, I don't know how to check the rear end fluid so I was just gunna replace the gasket and fill it up then. Does anyone have any ideas what could suddenly cause this?
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Joined: Dec 2001
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From: Ft. Lauderdale, FL, USA
Originally Posted by bigfoot2thefloor
I have rebuilt 4l60e w/3600 vig, s60 w/ 3.73's, and 40,000 miles on my 00 t/a. Ive had the rear for almost a year and the trans for about 8 months and its been running fine. This week Ive noticed the rpm's are at 3000-3500 cruising at 70mph.. it sounds like a lot of stress on the engine and if i recall correctly before they were at 2000-2500 around that speed. also if i accelerate slow then get into the gas I feel like i'm driving a v6. Ive found a small leak in the rear end seal and a small crack in the coolant line from the radiator to the water pump. but my water temp., trans fluid, oil pressure, and oil levels are fine, I don't know how to check the rear end fluid so I was just gunna replace the gasket and fill it up then. Does anyone have any ideas what could suddenly cause this?
The converter sounds like its going, but it can also be a slipping tranny. My cluthes were shot when PI took my converter apart and they said that it is the reason I was running 300-400 rpms higher than I normally did. When I got the new one back, it was back down to about 2,700 at 72mph.
And it can't be your rear-end, they don't slip. They either work or they don't, its a metal gear, no cluthes to slip.
I think a tuner can tell you the slippage in the converter, have that checked.
Also, your tranny could also be the culprit, it can be slipping.
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