transfer case help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rschap · 03-14-2022, 10:55 PM

I could use a little help troubleshooting. I have a 99 classic, K3500 that I blew the tranny on 2+ years ago. I finally got around to rebuilding the tranny, getting it reinstalled last week. During the test drive it acts like it’s in 4 low as far as shifting and power but the front wheels aren’t powered up and it should be in 2wd. It’s shifting through to 4th before I’m going 20mph when the selector is in 2 high. I shifted back and forth between 4 low, 4 high, and 2 high and got it to shift normal on a drive and it was working great but now it’s doing the same as before.

I did change the fluid and refilled with Valvoline Max Life Full Synthetic Dexron VI when I reinstalled it in the truck. I made sure all the connectors were reconnected.

b454rat · 03-15-2022, 07:46 AM

Sounds like linkage is bound up or something.

**special-K** · 03-16-2022, 07:35 AM

Yeah, it sounds like something in the shifter/linkage. Maybe not hooked up right somehow.

rschap · 03-21-2022, 12:27 AM

Well, I tore into the transfer case and the shifting fork is completely warn out. The nylon guide is gone and the fork has warn completely through. I'll be rebuilding the t case now. Thank you for your feedback.

**special-K** · 03-21-2022, 08:27 AM

Now there is another explanation for the issue I was hoping was not the case. You'll have a good one after the rebuild for sure

03-14-2022, 10:55 PM	#1
rschap Registered User Join Date: Aug 2017 Location: Grand Junction CO Posts: 14	transfer case help I could use a little help troubleshooting. I have a 99 classic, K3500 that I blew the tranny on 2+ years ago. I finally got around to rebuilding the tranny, getting it reinstalled last week. During the test drive it acts like it’s in 4 low as far as shifting and power but the front wheels aren’t powered up and it should be in 2wd. It’s shifting through to 4th before I’m going 20mph when the selector is in 2 high. I shifted back and forth between 4 low, 4 high, and 2 high and got it to shift normal on a drive and it was working great but now it’s doing the same as before. I did change the fluid and refilled with Valvoline Max Life Full Synthetic Dexron VI when I reinstalled it in the truck. I made sure all the connectors were reconnected. __________________ 99 Chevy K3500 Classic, Crew Cab, Long Bed

03-15-2022, 07:46 AM	#2
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,485	Re: transfer case help Sounds like linkage is bound up or something. __________________ 2000 Chevy Tahoe Limited 3/5" drop 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon stock SAS 6"

03-16-2022, 07:35 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,859	Re: transfer case help Yeah, it sounds like something in the shifter/linkage. Maybe not hooked up right somehow. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

03-21-2022, 12:27 AM	#4
rschap Registered User Join Date: Aug 2017 Location: Grand Junction CO Posts: 14	Re: transfer case help Well, I tore into the transfer case and the shifting fork is completely warn out. The nylon guide is gone and the fork has warn completely through. I'll be rebuilding the t case now. Thank you for your feedback. __________________ 99 Chevy K3500 Classic, Crew Cab, Long Bed

03-21-2022, 08:27 AM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,859	Re: transfer case help Now there is another explanation for the issue I was hoping was not the case. You'll have a good one after the rebuild for sure __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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