Reply
 
Thread Tools Display Modes
 
Old 01-09-2020, 11:40 AM   #1
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 6,306
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
Not a bus question. Needs some truck advice.

Hey Everyone,

This is not bus related but since the smartest people that I know hang out here I thought I would give it a shot.

My truck has the 5.9 Cummins, NV-5600 and 3.73 years. I've about had it with the gearing so I stopped by every shop in town and found one that is willing to swap out my 3.73's for 4..11's or 4.33's. Cool!....Ö Then I got the quote.... Almost $2500.Ö. That seems awfully high to me. I expected around half of that.

Am I expecting too much for my $$? Or is the shop charging too much?

Thanks.
PNW_Steve is offline   Reply With Quote
Old 01-09-2020, 11:55 AM   #2
Bus Crazy
 
Join Date: May 2016
Location: Georgia
Posts: 1,950
Year: 2001
Coachwork: Blue Bird
Chassis: IH
Engine: T444E
Rated Cap: 14
A quick Google search leads me to think this is not a simple carrier assembly swap, and further reading (I'm guessing it's a Dana Model 70?) indicates gears numerically higher than 4.10 require an axle housing swap. So they may simply be swapping the whole rear-end. I wouldn't be surprised if they are quoting a rebuilt axle (about the same cost as getting a rebuilt truck/bus axle).
Brad_SwiftFur is offline   Reply With Quote
Old 01-09-2020, 09:06 PM   #3
Bus Crazy
 
Join Date: Feb 2012
Location: Salt Lake City Utah
Posts: 1,619
Year: 2000
Chassis: Blue Bird
Engine: ISC 8.3
My 1999 Ram factory service manual happened to be lying open on the table tonight, so I looked through the section on the rear axles. Of course this Chrysler manual does not refer to the axles by their common Dana numbers, but maybe the information is still useful. It says the 248 axle might be equipped with a 3.55 or 4.10 ratio, while the 267 and 286 axles might be equipped with 3.54 or 4.10 ratios.


I guess that supports the idea that if you want a ratio numerically higher than 4.10 then you might (?) have to switch to a different (non-Chrysler) Dana housing.


FWIW, my '98 has the 5.9 CTD and 4-speed 48RE automatic turning 4.10 axles. When I do tow something it's usually heavy and the truck does okay, I guess -- but most of the time I'm running empty and lamenting the 13 MPG fuel economy which I blame on the 4.10's.
family wagon is offline   Reply With Quote
Old 01-09-2020, 10:42 PM   #4
Bus Crazy
 
Join Date: May 2016
Location: Georgia
Posts: 1,950
Year: 2001
Coachwork: Blue Bird
Chassis: IH
Engine: T444E
Rated Cap: 14
I have the opposite problem, I'm geared way too low (5.3. However, I have the N175 axle and I want to go to something 3.91 or numerically lower since I want reduced RPM at cruising speed.
Brad_SwiftFur is offline   Reply With Quote
Old 01-10-2020, 03:03 AM   #5
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 6,306
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
I am pretty sure that I have AAM 11.5 axles.

Anyone familiar with AAM and available gear ratios?
PNW_Steve is offline   Reply With Quote
Old 01-10-2020, 03:57 AM   #6
Bus Crazy
 
Join Date: May 2016
Location: Georgia
Posts: 1,950
Year: 2001
Coachwork: Blue Bird
Chassis: IH
Engine: T444E
Rated Cap: 14
What is the basis for your conclusion? You didn't mention what axle you had, so I Googled NV-5600 and read that transmission was used in certain years of Dodge trucks 2500 and 3500, and sort of guess-searched from there (not knowing what year or model your Ram was).
Brad_SwiftFur is offline   Reply With Quote
Old 01-10-2020, 03:59 AM   #7
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 6,306
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
Quote:
Originally Posted by Brad_SwiftFur View Post
What is the basis for your conclusion? You didn't mention what axle you had, so I Googled NV-5600 and read that transmission was used in certain years of Dodge trucks 2500 and 3500, and sort of guess-searched from there (not knowing what year or model your Ram was).


I have AAM axles and 3.73 gears. Sorry, I thought that I had already posted that.

I am not sure what "conclusion" you are asking about?
PNW_Steve is offline   Reply With Quote
Old 01-10-2020, 05:42 AM   #8
Mini-Skoolie
 
Join Date: Aug 2016
Posts: 27
I have the same truck. It is a Dana 80. If you look around the pinion you will see an 80 cast into the housing. The AAM wasnít used until 03-04. I have been through mine twice. I think if you step up to 4.10 you will need to change the carrier that the ring gear is mounted on. The bearings in mine were pretty worn at around 200k and ended up spinning on the carrier and had to be replaced.
Trailer2 is offline   Reply With Quote
Old 01-10-2020, 07:24 AM   #9
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 6,306
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
Quote:
Originally Posted by Trailer2 View Post
I have the same truck. It is a Dana 80. If you look around the pinion you will see an 80 cast into the housing. The AAM wasn’t used until 03-04. I have been through mine twice. I think if you step up to 4.10 you will need to change the carrier that the ring gear is mounted on. The bearings in mine were pretty worn at around 200k and ended up spinning on the carrier and had to be replaced.
I am fairly certain that my '04 has AAM axles.

I am beginning to get the idea that the swap is a bigger project than I thought it would be. Perhaps the $2500 is not out of line.
PNW_Steve is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:29 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×