CK5
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4.10’s or 4.56’s with 700r4, 35” tires
- Thread starter Chris Ziemer
- Start date
Yep. It’ll be fine for a year or so. It’s a pavement princess for the most part anyway.
And if needed, you will be in a slippery situation where the difference won't matter vs being stuck!
all the people in here telling you REAL WORLD feedback on he same combo and you ignoring it = i am done and wont look in here anymore .
700r4 and 4L60-e hate big tires in gears are not DEEP . so live with the hunting and bogging in overdrive .
700r4 and 4L60-e hate big tires in gears are not DEEP . so live with the hunting and bogging in overdrive .
I guess you won’t see this then. I’m really gonna miss you.
I fid my 89 back in the 00's.
The 3.42s had no grunt. Put a posi and 4:10's in it.
Never did one before, my boss had a monster truck. Between him and youtube it was a no brainer. Just be patient, don't settle for "close enough" and get the backlash right.
I took the old pinion bearings and sanded them with a sanding drum and made them into setup bearings. Easy peasy.
You got this. Going to do the 9.5" and 10 bolt front for my burb.
I will buy a pinion holding wrench though. I'm not strong enough to hold it with a breaker bar anymore!
3.42
Thank you Big Ray, and I’m listening. I would love to find a 14 b with a 410 or 453. But, I think I’m gonna pay a bundle for that axle out here, if it’s in good shape.
On flatland, my 308’s seem to work OK. And I’m easy on it. Anytime I go up the mountains or try to pull something relatively heavy, that’s when I really have a problem.
But again, I hear you. Don’t go through all the effort of installing the wrong gear set even if it’s on the right axle housing. For me, this just may be a multi step process in getting it right.
Certainly do appreciate all the good advice.
On flatland, my 308’s seem to work OK. And I’m easy on it. Anytime I go up the mountains or try to pull something relatively heavy, that’s when I really have a problem.
But again, I hear you. Don’t go through all the effort of installing the wrong gear set even if it’s on the right axle housing. For me, this just may be a multi step process in getting it right.
Certainly do appreciate all the good advice.
Well the 3.42 will be an improvement. 3.42 would be equivalent to 4.88 in 4th. So your 3rd gear will give you an understanding of how your engine powerband and tires will work with 4.88.
3/4 square body trucks came in the 14 bolt ff 4.1 flavor. You can pick one up for a couple of 2-3 hundred dollars. They're 8 lug though.
I've seen them in sets. With the 10b front.
Little late to the party on this. This Jimmy had 5.13 gears with 700r4, 1 tons, and 35's. It was actually decent RPM driving on the highway at 2600 RPM at 75mph. The OD makes a HUGE difference. Just do a RPM calculator and you'll see its better than 4.10 on highway with no OD.
Just wanted to give you all an update on the gear sitch. After looking for a 12 or 14 bolt for a couple of months, I wasn’t able to find one that had low enough gears in it or one that did, that didn’t cost 3k.
So, against nearly everyone’s advice, I redid the 10 bolt with 4:56’s. Just couldn’t wait anymore.
It’s a weird driver, at the moment. Behaves totally different than the 3:08’s and will take a little bit to figure out… like how to drive it. I feel like a teenager in his first car. All gas or all brake haha. I will say it no longer hunts for overdrive on the freeway.
RPM’s went from about 1800 to 2300 at 60ish, which was close enough to what the gear calculators said, close enough I’d call them accurate.
Super appreciate everyone’s input. It gave me a lot to think about and I definitely weighed it all.
Now I can take my time and find another axle (14b) to put in next year or the year after that, God willing.
Cost me $1200 all in btw. Drove it in, drove it out.
Thanks, Chris
So, against nearly everyone’s advice, I redid the 10 bolt with 4:56’s. Just couldn’t wait anymore.
It’s a weird driver, at the moment. Behaves totally different than the 3:08’s and will take a little bit to figure out… like how to drive it. I feel like a teenager in his first car. All gas or all brake haha. I will say it no longer hunts for overdrive on the freeway.
RPM’s went from about 1800 to 2300 at 60ish, which was close enough to what the gear calculators said, close enough I’d call them accurate.
Super appreciate everyone’s input. It gave me a lot to think about and I definitely weighed it all.
Now I can take my time and find another axle (14b) to put in next year or the year after that, God willing.
Cost me $1200 all in btw. Drove it in, drove it out.
Thanks, Chris
Thank you kbclamper! I’m sorry, I hadn’t seen this post until now!
I had to read the post all the way to give my opinion.
Your 350 engine is what makes me say 4.56
It will be strong enough for towing without compromise on long trips with high rpm.
My suburban with a 454 does fine with 4.10 and 35" tires, but if it had 4.56 I wouldn't mind.
My other suburban with 4.10 and a 350 does good enough with 33" tires but couldn't pull off 35" tires
By the way I just saw your post, I see you're in Galt.
I am up in Lincoln.
I do have plenty of parts including semi float axles, full float axles, as well as a set of 14bff and d60 4.56 with a rear Detroit locker if you get to a point where you want them, and I am not high on anything so I can give you a decent price
What size lift?
6" BDS with 6" rear springs. Rears were starting to sag a little and need to be addressed.
