Which gears? 4:10 or 3:55 - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 63 (permalink) Old 03-18-2011, 02:27 AM Thread Starter
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Which gears? 4:10 or 3:55

My 97 CCSB has 4:10 in the truck now and i was planning on a RSK, D60 , SD springs and 315s to help bring the RPM down on the highway.

Yesterday i bought a 94 F350 parts truck that has 3:55s.

I towed the 94 home tonight w/ the 97 and it towed quite well for a stock truck(chip in off postion due to slipping clutch). While I dont tow all the time, this will be one of this trucks dutys. Should i keep the 4:10 when i do a RSK and 315s or should i Swap in the 3:55s and run 285s?or still go 315s?

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post #2 of 63 (permalink) Old 03-18-2011, 02:37 AM
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Re: Which gears? 4:10 or 3:55

if the trucks main duty will be towing i think the 4.10 are best!

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post #3 of 63 (permalink) Old 03-18-2011, 02:47 AM
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Re: Which gears? 4:10 or 3:55

I have 3:55 and 315s and will also be installing a RSK and SD springs in a couple of weeks. I like the lower rpms and have no trouble towing but I never tow more than a couple of tons on a small flatbed.


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post #4 of 63 (permalink) Old 03-18-2011, 03:29 AM
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Re: Which gears? 4:10 or 3:55

I have 4:10 with 285's and it gets decent mileage and tows nicely.

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post #5 of 63 (permalink) Old 03-18-2011, 03:50 AM
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Re: Which gears? 4:10 or 3:55

I have towed stock with both. The 410's are the better pullers. They got way better mileage pulling than the 355's. IIRC, I did good to keep the 355's at or slightly above 10mpg pulling a 10k load. The 410's were running 13-14mpg for the same load. My Dodges pulled way better with 355's, but with the PSD's, the 410 win every time for me.
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post #6 of 63 (permalink) Old 03-18-2011, 06:29 AM
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Re: Which gears? 4:10 or 3:55

Excellent question...think it's a personal preference...I like the hand shaker best...
My 96 CCLB had 355's and ZF-5 and ran it with 285's and 315's awesome mileage high as 24.5 mpg (imperial gallons) usually not less then 19 combined....worst towing 12.
Sig truck came with 410s and 315's, E4OD and I hated it with the 410's so I swapped gears from truck to truck. Still don't really care for the E40D and the plan is to swap over the ZF-5 in time. I mean its ok on hard acceleration because you don't loose boost. I just don't like the feeling of on the peddle then you coast, brake...on the peddle again...

As your truck is ZF if it where me I'd put the 355s in it. When you tow you can leave it in 4th (if heavy, hilly) bla bla...

Not sure I have seen many CCSBs in a handshaker....that's rare in my area...cool. Then again you could try it as is then swap just the rears to see if you like it...

jrc

Tan white tan 97 ECLB, D60 PMF, RSK SD springs front, airs bags rear, 4:10, intake, FFD 205/30s, DP 4” exhaust DIY E-fuel, ZF-5 now
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post #7 of 63 (permalink) Old 03-18-2011, 06:44 AM
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Re: Which gears? 4:10 or 3:55

Quote:
Originally Posted by Diesel Avenger View Post
I have towed stock with both. The 410's are the better pullers. They got way better mileage pulling than the 355's. IIRC, I did good to keep the 355's at or slightly above 10mpg pulling a 10k load. The 410's were running 13-14mpg for the same load. My Dodges pulled way better with 355's, but with the PSD's, the 410 win every time for me.

Forgot to mention I had the E4OD on both of those trucks. I also had a 94 PSD with a ZF5 and 410's. It was a pulling monster. It was the best of the bunch, too.
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post #8 of 63 (permalink) Old 03-18-2011, 10:14 AM Thread Starter
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Re: Which gears? 4:10 or 3:55

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Originally Posted by JCart View Post
Excellent question...think it's a personal preference...I like the hand shaker best...
My 96 CCLB had 355's and ZF-5 and ran it with 285's and 315's awesome mileage high as 24.5 mpg (imperial gallons) usually not less then 19 combined....worst towing 12.
Sig truck came with 410s and 315's, E4OD and I hated it with the 410's so I swapped gears from truck to truck. Still don't really care for the E40D and the plan is to swap over the ZF-5 in time. I mean its ok on hard acceleration because you don't loose boost. I just don't like the feeling of on the peddle then you coast, brake...on the peddle again...

As your truck is ZF if it where me I'd put the 355s in it. When you tow you can leave it in 4th (if heavy, hilly) bla bla...

Not sure I have seen many CCSBs in a handshaker....that's rare in my area...cool. Then again you could try it as is then swap just the rears to see if you like it...

jrc
I am just wooried about loosing bottom end, taking off on hills and such w the 3:55s. But like you said i can just swap the rear axle and see how i like it.

Only problem w that is i want to tear this parts truck apart and get some $$$ back before i tear into my CCSB. Trying to decide to sell my D60 w 4:10 or 3:55

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post #9 of 63 (permalink) Old 03-18-2011, 02:21 PM
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Re: Which gears? 4:10 or 3:55

Is the zf5 the transfer case?

-kenny-
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post #10 of 63 (permalink) Old 03-18-2011, 03:17 PM
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Re: Which gears? 4:10 or 3:55

Stacks, the ZF5 is the Ford 5 speed trans.

Diesel Brad, I live in the hills and I saw no real difference with the 355's except the fuel mileage. There may have been a small amount of lost power, but not that much....IIRC. It has been a good while since I had that truck...got rid of it in 96. I could be forgetting something.
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