chevytruc1658

Hey everyone, thanks to all that helped me out on this. I went ahead and pulled the trigger on buying stock LT235 highway tires and I've got to say the difference was night and day. Not only does the truck drive a lot quieter and smoother which I expected, but the shift points going up a pass is spot on. Thanks again!

Good one...

Hey everyone. I got a line on a set of 6 very nice Alcoa 225 75 16 tires (stock size in my 99 3500 dually) but they came off of a 2007 Ford E450. They are 16” and 8x6.5 bolt pattern which is the same as the Chevy. I know the hubs on Fords are larger then Dodge and Chevy, and these hub openings measure 4 7/8” Which are in fact larger then Chevy so they should fit right?

Hey everyone, one other question. I got a line on a set of 6 very nice Alcoa 225 75 16 tires (stock size) but they came off of a 2007 Ford E450. They are 16” and 8x6.5 bolt pattern which is the same as the Chevy. I know the hubs on Fords are larger then Dodge and Chevy, and these hub openings measure 4 7/8” Which are in fact larger then Chevy so they should fit right?

Yea that’s all they are but they are very big treaded mud tires.

Yea tell me about it. Stock tires say 225 75 16 and I have 235 80 16 on it.

Thanks. Yea I purchased with those tires and I had a feeling that would be an issue. Do you recommend going to a 4:56? Or re programing the shift points?

Thanks for the reply so far! I looked at the codes and I have a GT5(4:10) GVWR 7600K and Unloaded weight is 6K

Hi Everyone, first post on here but have been a long time owner of numerous c/k chevy/gmc trucks. I currently own a '99 GMC K3500 crew cab dually pick-up truck with a 7.4 454 vortec engine with 160k miles. I recently purchased this truck just to tow my 7,100 lb travel trailer, not a daily driver. When I purchased it, I put a good amount of money into it, most of the things i did was not necessarily because it needed it but more because I wanted peace of mind knowing I had a truck that I could rely on. The truck drove and ran fine but did have a hard start when cold. I replaced the fuel pressure regulator but figured while I was under the plenum I might as well change out the notoriously troublesome injectors with new Bosh injectors. After that was done the hard start was fixed and the truck ran excellent. I then tested the truck by towing it up a nearby pass to see how it would perform and it severely struggled to go over 30 mph and shifted very hard into gear. I took the truck to the local Chevy dealership and they came back and said that the acceleration issue was a result of a bad fuel pump. I had that replaced and the hard shifting was gone!, and the truck ran even better. I then took it on another test tow and the acceleration was a lot better towing uphill in 3rd however it still struggles to stay above 45 and really has a hard time. So heres the deal, I totally get this is a 20+ year old truck and I am not expecting to do 70 up a mountain pass but do hope I can maintain 55-60 and not feel like we are going to slow down to a near stop when towing up a steep incline. I have been on a camping trip the last two weeks and the truck has been performing great aside from climbing the passe. What I am looking to get out of this post is if there is anyone who has experienced the same issue and what did you discover or upgrade to get the truck performing at a higher level. I really don't want to get rid of it and don't mind doing some minor upgrades like exhaust, headers, ECM upgrade but just don't want to throw money at it for very little to no gain. I have a attached a pic on the rig. HELP!