2005 2500HD concerns - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Divine 59 · 09-05-2020, 10:20 AM

Wanted to get some ideas on where to look for this issue.
Truck- 2005 2500HD 6.0 with 4L80E

From a stop there is a very slight slip felt when just pulling away. All shifts in the transmission are smooth.

Current truck has 33,800 miles. We purchased it about 9 months ago from the estate of my FIL. Surprisingly no other family member wanted a 15 yr old truck with 27700 miles on it.

I replaced the carrier bearing, lubed the yoke, and replaced the tail shaft seal due to seepage. Transmission fluid service by dropping pan and changing the filter.

Still has a slip. Is this just how a 4L80E operates? Hoping it is not a torque converter issue.

Thanks for feedback.

Ziegelsteinfaust · 09-05-2020, 10:24 AM

My 2018 V6 silverado has the rubberband from a stop light, as did my 2007 4.8. Plus just about every vehicle I ever had has had some rubber band for a stop.

Alot of it has to do with effective gears ratios.

Divine 59 · 09-05-2020, 10:35 AM

Thanks for the reply. I also looked at the u joints. They seem to be okay. The rear end ratio in this truck is 4.10:1

**hatzie** · 09-06-2020, 02:46 PM

Unfortunately it's normal for a slushbox transmission.
The torque converter lags somewhat then begins to hook up and it feels more than a little vague.
You don't really have a locked drivetrain til you clear the lockup MPH at the specified RPM.

Divine 59 · 09-06-2020, 04:57 PM

This is the first truck we owned with a carrier bearing. I am relieved to know it is not something serious with the transmission. Hoping this truck will last a while. Based on many comments it should do well into 200k.

Thanks to all for the responses. Chalk up the slip to the carrier bearing/two piece drive shaft.

skyphix · 09-14-2020, 09:46 AM

I have two 4L80E's - one in my swapped C10 and one in my Suburban. The torque converters flash up initially and to me, anyway, felt like a slip at first. It just sort of seems like its how a long first gear in a heavy vehicle with a higher stall RPM torque converter is going to be have with a stock-type converter.

09-05-2020, 10:20 AM	#1
Divine 59 Registered User Join Date: Sep 2011 Location: Austin, TX Posts: 306	2005 2500HD concerns Wanted to get some ideas on where to look for this issue. Truck- 2005 2500HD 6.0 with 4L80E From a stop there is a very slight slip felt when just pulling away. All shifts in the transmission are smooth. Current truck has 33,800 miles. We purchased it about 9 months ago from the estate of my FIL. Surprisingly no other family member wanted a 15 yr old truck with 27700 miles on it. I replaced the carrier bearing, lubed the yoke, and replaced the tail shaft seal due to seepage. Transmission fluid service by dropping pan and changing the filter. Still has a slip. Is this just how a 4L80E operates? Hoping it is not a torque converter issue. Thanks for feedback. __________________ My Build Thread http://s95.photobucket.com/user/drop...?sort=3&page=1

09-05-2020, 10:24 AM	#2
Ziegelsteinfaust Registered User Join Date: Dec 2012 Location: Temple City Posts: 3,558	Re: 2005 2500HD concerns My 2018 V6 silverado has the rubberband from a stop light, as did my 2007 4.8. Plus just about every vehicle I ever had has had some rubber band for a stop. Alot of it has to do with effective gears ratios.

09-05-2020, 10:35 AM	#3
Divine 59 Registered User Join Date: Sep 2011 Location: Austin, TX Posts: 306	Re: 2005 2500HD concerns Thanks for the reply. I also looked at the u joints. They seem to be okay. The rear end ratio in this truck is 4.10:1 __________________ My Build Thread http://s95.photobucket.com/user/drop...?sort=3&page=1

09-06-2020, 02:46 PM	#4
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,912	Re: 2005 2500HD concerns Unfortunately it's normal for a slushbox transmission. The torque converter lags somewhat then begins to hook up and it feels more than a little vague. You don't really have a locked drivetrain til you clear the lockup MPH at the specified RPM. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

09-06-2020, 04:57 PM	#5
Divine 59 Registered User Join Date: Sep 2011 Location: Austin, TX Posts: 306	Re: 2005 2500HD concerns This is the first truck we owned with a carrier bearing. I am relieved to know it is not something serious with the transmission. Hoping this truck will last a while. Based on many comments it should do well into 200k. Thanks to all for the responses. Chalk up the slip to the carrier bearing/two piece drive shaft. __________________ My Build Thread http://s95.photobucket.com/user/drop...?sort=3&page=1

09-14-2020, 09:46 AM	#6
skyphix Registered User Join Date: Sep 2018 Location: Hampden, ME Posts: 406	Re: 2005 2500HD concerns I have two 4L80E's - one in my swapped C10 and one in my Suburban. The torque converters flash up initially and to me, anyway, felt like a slip at first. It just sort of seems like its how a long first gear in a heavy vehicle with a higher stall RPM torque converter is going to be have with a stock-type converter. __________________ Eric 1980 C10 SWB 2003 Chevy Suburban 2500 LT



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