T-case rattles at 60 MPH...suggestions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Daubs** · 02-21-2005, 01:14 PM

It's a mutt (body from C20, frame and running gear from K20) 350 with 4 speed manual and I believe the 205 t-case. Shifts in and out of 4hi and 4low well.

When I approach 60 MPH the t-case shift lever starts to vibrate and make noise. Gets louder as I increase speed. Sounds like the linkage is rattling more than anything else. Suggestions?

I can certainly live with this because the truck isn't my daily driver. Wondering if I've got a slight kink in a shaft causing a little wobble. Or bad bearing in the case?

86SILVERADO · 02-21-2005, 01:20 PM

Well When I approach 60mph in the 67 Everything in and on the truck starts to vibrate and make noise.

I would check the easy stuff first like slop between the shift column and shaft on the t-case. Mounts and U-joints.

71swb4x4 · 02-21-2005, 02:06 PM

My shifter rattles too. I think a new shifter boot may hold it enough to keep it from rattling, but I am not sure. Let us know what you figure out.

da-burb · 02-21-2005, 02:29 PM

I have the same thing. I know when I am doing 55mph by the rattle. The short term fix is to put something over it like a mitten, welding glove, heavy rag. I didn't believe it would work, but it does. Matt Rein told me this trick a few years ago and I have used it since.

72 Cheyenne K20 · 02-21-2005, 02:30 PM

I had the same prob with a 70 k20. PO use the wrong size bolt and no washers to hold the shifter. Replaced with correct bolt and washers and was tight as new.

Scott

**Daubs** · 02-21-2005, 03:30 PM

I was wondering about washers and bolts for the shifter. I'll check into that. Thanks. The boot is cracked and I can see the cement through it. Replacement coming as soon.

Yes, it is a 30+ year old truck, and it's going to rattle and shake. I'm amazed that it doesn't sound worse than it does...I'm thinking the PO took good care of this ride.

02-21-2005, 01:14 PM	#1
Daubs Registered User Join Date: Jan 2005 Location: Eastern Nebraska Posts: 613	T-case rattles at 60 MPH...suggestions It's a mutt (body from C20, frame and running gear from K20) 350 with 4 speed manual and I believe the 205 t-case. Shifts in and out of 4hi and 4low well. When I approach 60 MPH the t-case shift lever starts to vibrate and make noise. Gets louder as I increase speed. Sounds like the linkage is rattling more than anything else. Suggestions? I can certainly live with this because the truck isn't my daily driver. Wondering if I've got a slight kink in a shaft causing a little wobble. Or bad bearing in the case? __________________ '72 Chevy K-20 Crate 350, SM465, 4.10's

02-21-2005, 01:20 PM	#2
86SILVERADO Registered User Join Date: Dec 2002 Location: Hills of Western Mass Posts: 626	Well When I approach 60mph in the 67 Everything in and on the truck starts to vibrate and make noise. I would check the easy stuff first like slop between the shift column and shaft on the t-case. Mounts and U-joints. __________________ 86 Silverado C10 back to 305 power! 67 C30 Dually Dump, with 350 transplant, Rockhauler 05 Duramax 3500 "If at first you don't succeed, try a bigger hammer" Member of the 1-Ton club!

02-21-2005, 02:06 PM	#3
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	My shifter rattles too. I think a new shifter boot may hold it enough to keep it from rattling, but I am not sure. Let us know what you figure out. __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

02-21-2005, 02:29 PM	#4
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	I have the same thing. I know when I am doing 55mph by the rattle. The short term fix is to put something over it like a mitten, welding glove, heavy rag. I didn't believe it would work, but it does. Matt Rein told me this trick a few years ago and I have used it since. __________________ Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087

02-21-2005, 03:30 PM	#6
Daubs Registered User Join Date: Jan 2005 Location: Eastern Nebraska Posts: 613	I was wondering about washers and bolts for the shifter. I'll check into that. Thanks. The boot is cracked and I can see the cement through it. Replacement coming as soon. Yes, it is a 30+ year old truck, and it's going to rattle and shake. I'm amazed that it doesn't sound worse than it does...I'm thinking the PO took good care of this ride. __________________ '72 Chevy K-20 Crate 350, SM465, 4.10's

02-21-2005, 02:30 PM	#5
72 Cheyenne K20 Registered User Join Date: Feb 2003 Location: Staunton, Virginia Posts: 554	I had the same prob with a 70 k20. PO use the wrong size bolt and no washers to hold the shifter. Replaced with correct bolt and washers and was tight as new. Scott

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