yes.
CK5
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How much can HP make up for gear ratio?
- Thread starter howdiy
- Start date
im in the middle of doing a 465/205 swap myself. one =because of the awesome granny but 2 is for the control it leaves you having over your rig. decel is much easier and wont keep you on the brake as much, plus theyre just plain fun.lol
smalltruckbigcid
1/2 ton status
Howdiy here's what I did to my K5-
I went from a 6.2 and 3.08 gears to a 500 caddy and 3.90 gears. I kept the t400 and 208 for now. I am running 35 inch pro comp mudders, had them with the 6.2 and 3.08 gears too. The tires were the first swap and I really noticed how much of a dog it made the 6.2. Then I did the gears and that helped the 6.2 a lot but it didn't really like highway driving at 65 anymore. After I put the caddy in the big change was the torque it has from idle up. Since I do mostly trail rides or snow one of my biggest trade-offs is highway speed. Gear too deep and highway speed sucks or or to fast and trail speed control is difficult. So the easy answer is torque can help make up for gears in some situations but it depends on what you are doing with the truck. Secondly is what about the driveline? Leaving the doubler out since you don't have one is how much tq is yours able to carry? The more tq you try to push through it the heavier it needs to be
I went from a 6.2 and 3.08 gears to a 500 caddy and 3.90 gears. I kept the t400 and 208 for now. I am running 35 inch pro comp mudders, had them with the 6.2 and 3.08 gears too. The tires were the first swap and I really noticed how much of a dog it made the 6.2. Then I did the gears and that helped the 6.2 a lot but it didn't really like highway driving at 65 anymore. After I put the caddy in the big change was the torque it has from idle up. Since I do mostly trail rides or snow one of my biggest trade-offs is highway speed. Gear too deep and highway speed sucks or or to fast and trail speed control is difficult. So the easy answer is torque can help make up for gears in some situations but it depends on what you are doing with the truck. Secondly is what about the driveline? Leaving the doubler out since you don't have one is how much tq is yours able to carry? The more tq you try to push through it the heavier it needs to be
75GmcJimmy4x4
1/2 ton status
what stock gear ratio do our k5 come with ??????????? i got a 75
drumz2129
Registered Member
Here is my experience:
I bought my 84 K5 with 6.2L Diesel, 700R4, NP208, 3.42:1, 31" 'buckshot mudders' All factory.
I added an ATS Turbo and had the transmission rebuilt (supposedly built up too). All was fine, I was getting up to 24 MPG on the highway.
Changed to 33" Dueler MTs, began to feel doggy. Eventually the transmission took a dump, prety sure it was a poor rebuild. From what i determined, the torque converter is what failed and ruined the rest of the transmission. Put in a well built 700R4 and was about the same. Then i regeared to 4.11:1, made a huge difference, transmission temps are now alot cooler and highway speeds are still around 75mph. Gearing seems useable even with my 35x15.50 TSL SX but i wouldnt want to go any taller without regearing. I was given an early 80s 1 ton single rear wheel with a SM465/NP205/D60/14FF combo that has 4.56:1 gears and are about to be transplanted.
My main concern would be for the auto transmission, especially if it is a 350 or a 700R4. Dont skimp on the torque converter. I would also put a electric fan on the trans cooler to keep air flow through it while at crawling speeds.
I bought my 84 K5 with 6.2L Diesel, 700R4, NP208, 3.42:1, 31" 'buckshot mudders' All factory.
I added an ATS Turbo and had the transmission rebuilt (supposedly built up too). All was fine, I was getting up to 24 MPG on the highway.
Changed to 33" Dueler MTs, began to feel doggy. Eventually the transmission took a dump, prety sure it was a poor rebuild. From what i determined, the torque converter is what failed and ruined the rest of the transmission. Put in a well built 700R4 and was about the same. Then i regeared to 4.11:1, made a huge difference, transmission temps are now alot cooler and highway speeds are still around 75mph. Gearing seems useable even with my 35x15.50 TSL SX but i wouldnt want to go any taller without regearing. I was given an early 80s 1 ton single rear wheel with a SM465/NP205/D60/14FF combo that has 4.56:1 gears and are about to be transplanted.
My main concern would be for the auto transmission, especially if it is a 350 or a 700R4. Dont skimp on the torque converter. I would also put a electric fan on the trans cooler to keep air flow through it while at crawling speeds.
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broncoman6524
1/2 ton status
Honestly...how can you afford to build a big block...to push 500 fl/lbs.
But then NOT afford/want to regear your axles??
Seems backwards to me...
But then NOT afford/want to regear your axles??
Seems backwards to me...
jonathon
1/2 ton status
3.73's and 315/75r16's.. and it's a dog around town though on the highway in third it moves good.
I'm thinking of either 4.56's or 4.88's.. end tire size for this rig will be a 37" so probably the 4.88's..
I'm thinking of either 4.56's or 4.88's.. end tire size for this rig will be a 37" so probably the 4.88's..
Easy access to parts plus free machine work
I think I'll just get a doubler down the road instead of re gearing
75GmcJimmy4x4
1/2 ton status
ran the rpo's and called a dealership they told me mine came with 4.10's cause of some type of towing package that was on my jimmy
