Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > Vintage RV's
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-24-2014, 08:31 AM   #1
Member
 
jaydar's Avatar
 
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Aug 2014
Location: Sierra Vista, AZ
Posts: 54
Tranny upgrade question

Hello, requesting opinions and suggestions. My 1988 Fleetwood Jamboree, has a three speed transmission, no power for going up hills, on flat surfaces runs like a champ. In my mind the current three speed transmission is working to hard. This is prior to the introduction to the overdrive tranny. I am always waiting for the trans to kick into OVERDRIVE to relax the engine, but that never happens. My question is, can the current 3 speed transmission be replaced with an overdrive transmission and would this improve hill climbing and gas mileage. Can anyone provide any suggestions?
__________________

__________________
jaydar is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 11-24-2014, 09:50 AM   #2
Senior Member
 
Smitty77's Avatar
 
Join Date: Aug 2010
Location: Over the next hill, around the next curve...
Posts: 3,312
Look for a Gear Vendor. You might find a used one, and then have it looked over by Gear Vendor for a fee. I think this would help, and be much easier then try to retro a newer transmission into the coach.

Best of luck!
Smitty
__________________

__________________
Roo II is our 04 Country Coach Allure 40'
OnDRoad for The JRNY! Enjoy life...
Smitty77 is offline   Reply With Quote
Old 11-26-2014, 07:41 AM   #3
Senior Member
 
Daveinet's Avatar
 
Join Date: Dec 2013
Location: Chicago Area
Posts: 361
Ford or GM? GM conversion to a 4L85e is not too difficult. Trans controller is about 600 bucks and is very straight forward. You have to shorten the driveshaft, move the trans mount 2 inches back. Pretty much everything else is bolt on.
If you have a Ford, then I have no idea.
__________________
'83 Revcon Prince 31' FWD FMCA F298817
502 w/Howell/GM ECM/Edelbrock MPFI,Thorley's & Magnaflows, 4L85E 4 spd, KoniFSD
Daveinet is online now   Reply With Quote
Old 11-26-2014, 07:59 AM   #4
Senior Member
 
RBeau1954's Avatar
 
Ford Super Duty Owner
Join Date: Aug 2014
Location: Indianapolis
Posts: 141
I have an 89 Fleetwood Tioga with the same 3 speed tranny. Gear Vendors can do an overdrive unit for any tranny at about 4 grand but that won't help with the hills. I did a calculation on the C-6 tranny that is in the Ford units and at about 62 MPH the 460 is right about at its peak torque range and doing a little over 2500 RPM. It sounds like it is making a racket but it isn't even close to redline. My unit has the 4.10 rear end.
__________________
Rick and Mimi
1989 Class C Fleetwood Tioga, 26 ft on an E350 Frame
Toad: 2008 VW New Beetle Convertible SE
RBeau1954 is offline   Reply With Quote
Old 11-26-2014, 08:37 AM   #5
Senior Member
 
Join Date: Feb 2011
Location: Snowbird - Waterford Mi and Citrus Springs Fl.
Posts: 3,609
Without really getting right into it, I would wonder if the engine would have enough power to pull the overdrive ratio on the level, without changing the rear differential gear as well?

If it did, you might pick up some mileage, but how many mile would you have to drive to get a return on your investment?

Last, I don't think an overdrive tranny is going to be of much help in the bigger hills. Most any transmission is not going to be in top gear when climbing hard, so nothing available to gain there.

If you add the price of the necessary mods to what your coach is worth, would you be able to buy a later model coach with a factory equipped trans of your choice?
__________________
1997 37' HR Endeavor, 275hp Cat, Freightliner
03 CR-V Blue Ox, Ready Brake
ahicks is offline   Reply With Quote
Old 12-12-2014, 11:56 AM   #6
Senior Member
 
Curtis in TX's Avatar
 
Join Date: Apr 2010
Location: Rhome, TX
Posts: 416
Quote:
Originally Posted by ahicks View Post
Without really getting right into it, I would wonder if the engine would have enough power to pull the overdrive ratio on the level, without changing the rear differential gear as well?

If it did, you might pick up some mileage, but how many mile would you have to drive to get a return on your investment?

Last, I don't think an overdrive tranny is going to be of much help in the bigger hills. Most any transmission is not going to be in top gear when climbing hard, so nothing available to gain there.

If you add the price of the necessary mods to what your coach is worth, would you be able to buy a later model coach with a factory equipped trans of your choice?
I'm with Hicks on this one. 13 years ago I re powered my 89 Fleetwood from gas to diesel and put its Allison 542 behind it. Sadly the 542 was not an overdrive transmission nor did it a lock up torque converter transmission. The Allison world 1000 we're not on the used market yet when I did this swap in 2001.

I just finally got my hands on a 5 speed Allison 1000 and that swap is going to cost me around $4000 and I'm doing the work myself. The original engine swap cost me 10,000 dollars. If Had to do it over I would have traded my coach in and got me a diesel to do what I wanted to do. But I like my old girl and she comes in real handy. She's paid for it has been for a long time.


Sometimes the math helps make up one's mind.

I will never get that money out if her if I sell.it. But that's OK I'm not planning on selling anytime soon.

If you have to pay a mechanic to do your upgrades then it really is hard to justify.
__________________
Curtis in TX is offline   Reply With Quote
Old 12-12-2014, 12:06 PM   #7
Senior Member
 
SuperSteer's Avatar
Official iRV2 Sponsor
 
Alpine Owners Club
Join Date: Dec 2013
Posts: 177
Blog Entries: 8
A Gear Vendor Over/Under Drive gives you the option of 2nd gear overdrive, basically giving you a gear in between 2nd and 3rd, very helpful in hills and your current rear end gearing should be fine for 3rd gear overdrive on flat ground.
__________________
SuperSteer is offline   Reply With Quote
Old 12-27-2014, 03:15 PM   #8
Senior Member
 
Join Date: Aug 2011
Location: lancaster CA
Posts: 543
Put a gear vendor in my 93 dodge 3500 with 4.10 gears. I was looking for more mileage. Did not help. Did give me 2nd over split. $3500.00 wasted. Should have gone with newer trans with torque converter lock up mods.
__________________
2001 dodge 2500 auto, with billet Mojave Green torque converter with 2nd gear lockup mod, raptor 100 fuel transfer pump and gauges. RV275 injectors
94 Alpenlite 27sl with many mods. Master mechanic over 55 years
oldbeek is offline   Reply With Quote
Old 12-27-2014, 11:49 PM   #9
Senior Member
 
Daveinet's Avatar
 
Join Date: Dec 2013
Location: Chicago Area
Posts: 361
Oldbeek, I'm not the least bit surprised. If the engine RPM is too low at cruise, the TC slips too much, and you loose efficiency. With my old TH400, I found unless the engine was turning 2500 RPM, the TC was slipping. I could travel 60 mph, or 75 mph and would get the same mileage, because I was wasting so much power from TC slip at the lower RPMs.
__________________

__________________
'83 Revcon Prince 31' FWD FMCA F298817
502 w/Howell/GM ECM/Edelbrock MPFI,Thorley's & Magnaflows, 4L85E 4 spd, KoniFSD
Daveinet is online now   Reply With Quote
Reply

Tags
upgrade



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Leaving tranny in gear while parked georgetown350 Class A Motorhome Discussions 12 10-28-2014 06:04 PM
Towing with 1/2 ton & no tranny cooler? Camping in MN Trailer Towing and Tow Vehicles Discussion 11 04-17-2014 12:30 PM
1994 Winn Vetra Allison tranny issues RageATV Allison Transmission Forum 2 04-10-2014 08:51 AM
Improvements to upgrade Tow capacity?? Randy Q Trailer Towing and Tow Vehicles Discussion 25 03-03-2014 01:38 PM
KVH R-5 upgrade Jeep trekker Technology: Internet, TV, Satellite, Cell Phones, etc. 7 02-23-2014 09:53 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:01 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.