Overdrive

[FATCAT]

I need some help for a buddy of mine, he's looking at a 01. 5 2500 Quad fully loaded with an auto trans with 4:10 lsd. I have a 5speed so I can't help him out with this. He will be towing a 23' tt that weighs just under 5000 loaded. The question is will the 4:10's be to much gear and can he drive in overdrive without any problems, the tires are 265 75 16







Thanks for any Help !!

 

[MPatrick]

FATCAT,



I posed a similar question a short time ago. See my signature. When My trailer is loaded and bed is loaded, I have about 7500 lbs on or behind me, I do not run in overdrive until I can run 65 mph min on almost flat and not having to pass roadway. Your friend has a 4:10 rearend, that gear is geared for hauling larger loads. I am sure some of the gurus will chime in and explain. One of the rules I was told: Do not let it lug. These engines run best at around 2000 rpm's, Do Not switch into OD (3:54 265 tires) until 1700 rpm's min. I run the hell out of mine.

 

[Batman]

With 4. 10's I ran O. D. above 50mph, below 50mph I lock O. D. out so I don't lug the engine. I've had no problems with this. I tow up to 10k lb 5er.

I like the 4. 10's for my weight and speeds I run.

HTH

 

[RedRamer]

I know the 01's like to run higher rpms, but with that weight trailer I cruise all day long in OD with 3. 54's.

1750 RPM gives me 100 kph. Up steep grades slows down and sometimes I'll pop it into 3rd, good hills I top out at 1,500 rpm usually. For overall performance the 3. 54 are it for that eight imo. The 4. 10's would be overkill and wasted fuel long term, but for short hauls, what the heck, he should be pulling circles uphill on everyone else.

 

[Tom C]

When I go to get my next truck I'll look really hard at getting the 4:10 gears. I have the 3:54 and they work fine for local driving but I'm not fond of them when towing. Since the Auto transmission has a taller OD that the 5 spd (0. 69 for auto and . 75 for 5 spd) I would think that the 4:10 with an auto would be a good setup. When my truck was stock it was a dog with the auto. nothing like the 5 spd I used to have. With my current mods though Its no dog now. It has enough power now that I could run up hill in OD at 40 MPH at 1000 RPM with ease while towing 8000#. although thats a good way to burn up an auto. I lockout of OD for any driving under 50MPH. otherwise it can do 80MPH+ up the steepest of hills in OD with a 8000# load.



If I had the 4:10 I may not had to put the mods in. I'll test one though next time.



Good Luck

 

[CGoyette]

od ok for wt with 4:10

I have a 10K 5ver and I haul in OD up to 65MPH. No problems

see sig

Curt

 

[MoparDave]

Go with the 4. 10 gears, you will be happy you did. I had the 3. 55 in my last auto I will never again.

 

[SnoKing]

I tow at 63-65 in OD on flat and small hills. Runs up the bigger hills at over 60 turning 2700-2800 RPM in 3rd. I can push the EGT's to high pushing it at higher RPM's under load. Jardine 4" exhaust is next on the list.



I never get on it below 1800 RPMs when towing. Note RPM's are in 125 RPMs divisions on the tach face, Dodge counts funny. The only short coming of the 4:10 is that you do not have a high speed freeway cruiser, however if you tow, the 4:10 is the way to go with the new trucks. Mileage is not that much different, these newer 24V like RPM's. SNOKING

 

[Tom C]

snow king, My truck differs from yours. when towing at low rpm's I get hotter egt's than at higher rpm's (ie: uphill at 45mph in OD with 8000# load will run 1250°... same hill in OD with 8000# load at 70mph will run 1000°). If I run in third up that same hill at 45mph with same load it runs at 950°. all mods are listed in my sig. I have stock exhaust.



The hottest Ive seen it was 1300° at 40MPH in OD with 8000# load uphill. I was just lugging it way to low hehind a slow semi. I turned the OD off and temps went down to 1000°



PS: is that boat a Viking or Bertram??

 

[Steve M]

I tow our 5th wheel with O/D enabled unless I'm coming up to a steep incline. Then I'll lock out O/D to let it shift to 3rd before I pour on the coal for the incline. One reason I like the 3. 54 ratio is I can do this at 65mph and still be below peak hp at 2500rpm. Our '01. 5 is very quick to shift out of O/D and very late to shift into O/D. Some might consider this a problem but I like it. It'll hold 3rd while towing under 50mph unless I let off the throttle and let it shift to O/D. While accelerating onto the interstate, it'll hold 3rd until 65mph and shift to O/D after I settle into a steady cruise. At 65-70mph it doesn't shift out of O/D so I don't have any hunting problems on the interstate. The way this transmission is set up, it will not let me lug the motor or put too much on the torque converter clutch at low rpm. It's stock and a major improvement over the '95 auto I used to grumble about.

 

[SnoKing]

Tom C



Boat is a Bayliner 3388 Motoryacht 1996.



SNOKING

 

[Tom C]

snowking, those bayliners are nice cabin cruisers. run a comfortable 14 to 17 knots and are roomy. I wouldnt like to fill her up with the 300 gallons of fuel though



Nice Boat

 

[SnoKing]

Tom C



Mine has the B150 Cummins 4 cyclinder diesels, newer ones have 250hp 4 cyclinders. Cruises 14-15 knots at 2500RPM. I have 950 hours on the engines and have used 4 GPH combine since new. I run at 1700 half the time at 8 Knots. Diesel has been cheap most of the time compared to gas. Holds 200 gals. Buy most of it at a commercial dock. Have paid between 72 cents and 1. 35 per/gal in the last 5 years.



We like it, king sizes bed and enclosed shower stall are two of the better features.



SNOKING /Capt. Chris

 

[klenger]

Snow King:



I assume that you do not have to pay road taxes for diesel for a boat. Am I correct? That would reduce the price a bunch.



kl

 

[SnoKing]

klenger

That's correct the commercial fuel docks charge Wa. State Sales tax in the place of the road tax. Makes it a lot cheaper. Washington does have a refund program for boaters that by gas or diesel for their boats that is taxed with the road tax. You have to keep receipts and turn them into the state, I believe at the end of the year.



SNOKING/Capt. Chris