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Old 04-19-2014, 07:24 PM
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Earthlinklandscaping Earthlinklandscaping is offline
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Is a gmc 6.5 diesel a truck to run away from?

I found a truck a 97 gmc k1500 6.5 diesel. Needs a little work. Says tranmy is slipping, just needs a fluid change. I was just wondering what you guys think? Is that a good engine
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Old 04-19-2014, 07:26 PM
whiffyspark whiffyspark is offline
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A fluid change will not fix a tranny slipping.
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Old 04-19-2014, 07:38 PM
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gallihergreen gallihergreen is offline
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Quote:
Originally Posted by Earthlinklandscaping View Post
I found a truck a 97 gmc k1500 6.5 diesel. Needs a little work. Says tranmy is slipping, just needs a fluid change. I was just wondering what you guys think? Is that a good engine
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JCLawn should post in here. He has a 6.5 I believe.
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Old 04-19-2014, 07:48 PM
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JCLawn and more JCLawn and more is offline
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I do, 2 of them. When you say the tranny is slipping what do you mean? The 4l80e in it is a mushy transmission anyways. The stall is 2200 rpms. When you hit the brake and hit the gas it should stop reeving at around that. Then when you pass 45mph and go easy on the throttle it should go into overdrive and lockup the torque converter and then there should be no slip in the trans. If you are picking it up cheap then putting a 1200 rpm stall torque converter in it and you will gain a lot more torque. The 6.5 is a fine engine once you understand them. They are a preferred motor by the military and marine industry for a reason.
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Old 04-19-2014, 07:49 PM
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JCLawn and more JCLawn and more is offline
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they might of put a 4l60e trans in it and that is something you need to figure out. If it does that is to weak of a trans for a 6.5
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Old 04-19-2014, 07:53 PM
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JCLawn and more JCLawn and more is offline
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Well rock auto says they only used the 4l80e so that's a good sign. I said a lot about their issues here http://www.lawnsite.com/showthread.p...ght=6.5+diesel and I don't feel like typing a paper again haha
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Old 04-19-2014, 09:07 PM
slinky slinky is offline
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I had a 6.5 for 3 years. The pdm is the biggest issue I had. The 4l80 slipping will probably need a rebuild. Its probably been over heated
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Old 04-19-2014, 09:14 PM
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JCLawn and more JCLawn and more is offline
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I had a 6.5 for 3 years. The pdm is the biggest issue I had. The 4l80 slipping will probably need a rebuild. Its probably been over heated
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He needs to figure out what is wrong. When I first got min I had 3 mechanics chanting "rebuild" and it was a 10 cent o-ring on a sensor. These trans can take high heat, but its not good for them. I hit 260 this winter plowing snow and that was in low range and if the tps goes out it will run 220 or more. My guess his torque converter is shot, or its something simple like the tps acting up and not letting torque lock up happen.
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