teb1272
Memphis
Senior Member
Joined: 12/14/2006
View Profile
 Offline
|
If you do the calculations for the E40-D, 60 mph should be 2385 rpm in 4th OD, and 3360 in third (1:1). 65 mph would be 2580 in 4th, and at 65.5 indicated (63.2 measured over 5 miles of flatland) my tachometer was indicating 2500 rpm. This uses Michelin tire diameter numbers and revolutions per mile numbers, a 5.13 rear axle ratio and the transmission gearing numbers for the E-40D (2.71, 1.54, 1.00 and 0.71).
You might talk to someone like Jasper, who overhauls and upgrades the transmissions, about a switch. Find them online-I've found them helpful and have one of their units.
|
Daveinet
il
Senior Member
Joined: 10/29/2003
View Profile
Offline
|
Nobody answered if he currently has a lock up torque converter. Does it?
Another option would be to just buy a ECM from a local Junkyard. Assuming it uses the same sensors ie MAP, you could have a custom wire harness made for a few hundred bucks. If the injectors are not the same size, you could get the chip burnt or swap injectors, still not difficult and much cheaper than 1 grand for a control module. I can't imagine why there is aftermarket for stand alone trans module.
Dave
FMCA F298817
'83 Revcon Prince 31' FWD
502 w/Thorley's & Magnaflows,
Howell/Edelbrock MPFI, Koni FSD,
Class A built for gear heads 
My Revcon Website
Revconeers Forum
XP activation frustration
|
Gale Hawkins
Murray, KY
Senior Member
Joined: 07/22/2007
View Profile
Offline
|
What is the current MPG average? Short of having money needed to be blown on upgrades I think driving it would be the logical choice. These units are passed their prime and if it has made it the last 15 years as is what is the point to putting huge bucks into the rig that will not have a return on investment. Lower RPM's do not mean one will see higher MPG in loaded gas trucks. This is not new news folks. I am finding I am running our 1992 chassis with the 4L80 more and more in D vs OD and liking it. I do not have the MPG tested yet but it sure is easier on both the MOTOR and TRANSMISSION. Using OD in older gas fully loaded trucks is more of a no no than a yes yes. They are great where you run half the time empty. You can do that with a Class A but it is too much work to remove the house and remount it. 
|
GitRdun
KS
Full Member
Joined: 02/15/2005
View Profile
Offline
|
We have thought about tradeing up to a newer model. But we bought this cash so its paid for and i dont want a loan payment on something we will only use maybe 5 times a year if that. My only serious complaint is i wish we had bought a coach with a slideout, our next one will absolutely have one. We had a Banks full exhaust system installed on this coach, cost about $4000 for installation and parts on a $13-$15,000 coach i think it would be a better investment for us right now to just fix this one up the way we want it instead of buying a newer model. Right now we have two kids ages 1 and 3 and dont travel more than 200 miles from home with the RV, its used more for camping then traveling. Our motorhome needs right now are a little different than the average RV traveler. Gas mileage isnt a sticking point for me since we dont use it every week.
Sounds like a Gear Venders unit may be the way to go for my situation. I will have to check and see if it has a lockup converter on it.
92 Fleetwood Pace Arrow
|
j-d
Sunny Florida USA
Senior Member
Joined: 09/04/2003
View Profile
Offline
|
The GV system will probably be more useful. Think of how often you'd like to be in "second over" climbing hills when it revs to the max in second but bogs in third.
C6 did not have a lockup converter in any year, to my knowledge. Such an animal is available from a post I saw years ago on another forum. It was stated as being helpful, but I'd check it for load rating before jumping in.
God Bless, jd
|
|
|
w0jon
Warren, Minnesota
New Member
Joined: 03/30/2006
View Profile
Offline
|
I have the 460 in an 89 Fleetwood limited and also have the GV and really believe in it. Always have a gear and it drops approximately 400 rpm when engaged. GV also has a lifetime replacement after warranty of 750 bucks... Mine is a carburated 460 with the C6 tranny.
|
sjholt
Henderson, NV
Senior Member
Joined: 04/08/2007
View Profile
Offline
|
>>>GV also has a lifetime replacement after warranty of 750 bucks...
I blew a gear vendors up 4 years ago, called them up and told them that maybe the cases could be used, but I doubted that, and they said that it was $650 replacement regardless. When I arrived at their factory with junk in a box- they went out to the production line and brought me a new unit.
I found out then that over the years they had change lubes from Dextron 3 to an 85 wt. synthetic trans/rear end lube. If I had known that- that OD unit would still be running. It had 90K on it when went.
The cost will stagger you- but is it worth it--YES.
Skip
1996 32' Monaco Windsor DP
Cummins 5.9L 230 HP
5 Airbags in front- 4 in back
|
bill h
el segundo
Senior Member
Joined: 08/02/2001
View Profile
Offline
|
j-d wrote:The GV system will probably be more useful. Think of how often you'd like to be in "second over" climbing hills when it revs to the max in second but bogs in third.
Yup.
Bill and Susan
84 Barth 30 tag powered by ht502/Thorley, Gear Vendors OD
Siamese Calvin and Airedale Hobbes
4WD Toyota toad
|
wshrman
Orange, Ca.
Senior Member
Joined: 05/26/2003
View Profile
Offline
|
GitRdun,
If you haven't talked with GV yet I'd give them a call. Nice people to deal with and could put you on to someone in your area to install. The driveshaft will need to be shortened and BALANCED. Hopefully it will be someone other than CW?
2000 Rexhall Roseair 3450 V10, GearVendor, AutoFormer
2001 Ranger, Remco, BRAKEbuddy
Belgian Sheepdogs, Blazer & Chayna
Shareholder Pismo Coast Village
|
Deen
Vancouver, WA
Senior Member
Joined: 12/07/2000
View Profile
|
We had a '88 Okanagan 17' MH with TT towing package 460 engine in the 350 van. Weighed 8,800#'s. Put the gear Vendors unit in. Much nicer cruising RPM but no real mileage improvement. Save your money if all you want is better mileage.
Deen - Vancouver, WA
'02 Dutch Star 4090 (41+', triple slide)
435/1200 ISC Cummins/Banks PowerPak
'08 Honda Civic/dolly
'05 Honda Odyssey/dolly
NRA Benefactor Life Member
FMCA f47302s, Life Member: Good Sam,
Newmar DP Owners Group
51st yr of RV'ing
|
|
|
