3:92 Axle

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Jun 11, 2010 | 04:40 PM

Steves55

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Tuned

Joined: Apr 2010

Posts: 366

Likes: 3

3:92 Axle

My 55 is still running with the 223 6 cyl and 3-spd 3

2 axle. I took it on the freeway and was crusing between 65-70 mph. Although the truck handled nicely, is this a bit too fast for this set-up? I don't want to blow-up the engine. I realize trucks seldom (if ever) traveled at those speeds. Thanks.

Jun 11, 2010 | 05:09 PM

59flatbedford

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Joined: Feb 2006

Posts: 1,325

Likes: 3

well depends on what rpm your running at that speed but the motor is not going to self destruct at 2500-3000 rpm. the internals might wear a little more but not like its going to come flying apart.

Jun 11, 2010 | 10:16 PM

fifty-two_f1

Fleet Mechanic

Joined: Mar 2010

Posts: 1,342

Likes: 1

From: Jamestown, IN

I put 3.33s in my 52 that his the 215 6 with a 3sp and it runs 70 no problem with out having the rpms up too much.

Jun 12, 2010 | 03:36 AM

jake08

Elder User

Joined: Jun 2007

Posts: 807

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From: Cypress,Ca.

Yup, just changed to 3.31. 223ci, 2500rpm, 65mph, freeway machine! Very happy. LOL

Jun 12, 2010 | 12:03 PM

fking1

Elder User

Joined: Jul 2004

Posts: 825

Likes: 3

From: Michigan

I have a 55 V8 with 3.90 and when on the Freeway keep it at around 60mph.
Don't like the engine revs at 70, but, I don't think it will hurt anything at 70.