9 Speed trans??? - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by xnaibasx, this thread has received 5 replies and been viewed 852 times.

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 12-08-2006, 01:56 AM Thread Starter
 
Join Date: Dec 2006
Posts: 6
Points: 1,115
Thanks: 0
Thanked 0 Times in 0 Posts
9 Speed trans???

I got 4.11 gears and a 5 speed trans and it sucks on thw highway! 75 mph at like 2700 rpm. I know gear venders make a conversion to make it a 9 speed i got a feelin its might be a little pricey... so is there any thing I can do besides change the gears.

Thanks
Jim
xnaibasx is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 12-08-2006, 02:25 AM
 
Join Date: Sep 2006
Posts: 7
Points: 30
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by xnaibasx
I got 4.11 gears and a 5 speed trans and it sucks on thw highway! 75 mph at like 2700 rpm. I know gear venders make a conversion to make it a 9 speed i got a feelin its might be a little pricey... so is there any thing I can do besides change the gears.

Thanks
Jim
Wow. My 4:10 rear runs at/touch under 2500 at 75mph. Sure that aint a 4:33??

I guess you could slow down?
I would guess you are getting about 12 mpg (possibly less?) at that speed? You MIGHT see 15 mpg at 2200 rpm/75mpg.....

If you drive some what regular number of miles per year, you might find that even spending money on gears would equal about a 4yr payback. Reality seems that an improvement of a few miles per gallon is not very much cash at the end of the year saved.
Duker is offline  
post #3 of 6 (permalink) Old 12-08-2006, 02:48 AM Thread Starter
Threadstarter
 
Join Date: Dec 2006
Posts: 6
Points: 1,115
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Duker
Wow. My 4:10 rear runs at/touch under 2500 at 75mph. Sure that aint a 4:33??

I guess you could slow down?
I would guess you are getting about 12 mpg (possibly less?) at that speed? You MIGHT see 15 mpg at 2200 rpm/75mpg.....

If you drive some what regular number of miles per year, you might find that even spending money on gears would equal about a 4yr payback. Reality seems that an improvement of a few miles per gallon is not very much cash at the end of the year saved.
HAHAHA yea slowing down might help, But yeah im almost positive i got the 4:11 and my fuel mileage isnt that bad just wanted to get the rpms down a bit i do a lot of highway drive for 5 hours or more so. My friends got 3:73 i think and hes at 2200-2400 at 80 so...

but thanks
Jim
xnaibasx is offline  
post #4 of 6 (permalink) Old 12-08-2006, 04:04 AM
Senior Member
 
bmoeller's Avatar
 
Join Date: Dec 2008
Location: NW IL
Posts: 4,827
Points: 67,701
Thanks: 158
Thanked 392 Times in 331 Posts
Garage
Getting a Gear Vendors or US Gear gearbox isn't going to pencil out very well, if you are hoping for better mileage. If you have several grand burning a hole in your pocket, or need more gears for towing, than go ahead and get it if you want.

Would probably be cheaper to do a gear change in the diff(s), or go with some even taller tires.

"Some people are educated beyond their intelligence."

'93 W350 CC, LE, 5spd, HTT modded H1C, 4" DE

Sold- '99 3500 Q/C, SO CTD, 4x4, 5spd.

Traded off- '97 3500 C/C, 4x4, CTD

'92 W250, LE, CC, CTD w/ tweaked pump (SOLD)


"Obama = Hoax and Chains"

If Obama is the answer, it must have been a stupid question.
bmoeller is offline  
post #5 of 6 (permalink) Old 12-08-2006, 04:25 AM
Member
 
Join Date: Jun 2006
Posts: 89
Points: 1,287
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by xnaibasx
I got 4.11 gears and a 5 speed trans and it sucks on thw highway! 75 mph at like 2700 rpm. I know gear venders make a conversion to make it a 9 speed i got a feelin its might be a little pricey... so is there any thing I can do besides change the gears.

Thanks
Jim
1997 F-250 5 speed

K&N intake
3" Down pipe
EDGE evolution
5" grandrock stacks
33 12.50 R16.5 wheels
You've already increased your tire size by 6% therefore your rear end ration is about 3:88. When I ran stock tire with my 4:10s, I'd run 75 about 2350-2400rpm, but then when checked against mile markers and GPS I found that the speedo was running a little fast - probably saved me a ticket or two.

Did you use the edge to adjust your tire diameters? Have you verified the spedo calibration against a measured mile or a GPS unit? You may be running faster than you think. Gear vendors unit is very pricey!

1999.5 F350, PSD, CC, LWB, DRW, 4x4, assorted mods < PowerStrokeNation.Com >
http://banners.wunderground.com/weat...NJ/Boonton.gif
389SixPack is offline  
post #6 of 6 (permalink) Old 12-08-2006, 10:46 PM
Hotsauce2138
 
Join Date: Mar 2006
Posts: 496
Points: 6,539
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to HotSauce2138 Send a message via MSN to HotSauce2138
Talking

my lil brother has a gear vendors in his '92 7.3L and it is awesome, yea its expensive but its pretty cool it dropped his rpm's -500. he used to do like 70 mph at 2300 rpm now its down to 1800, and he gets about 13-14 mpg but he's 16 and he loves to blow smoke.

i want one for my 99, when im doing 75 mph im doing like 2300 rpm so if i had that extra gear it would lower it down to 1800 and i could get a lil mileage and go faster.:evil:

SAM

SAM
Late 99 F-250 CC SWB Lariat 6 sp. 4x4 - the mods= Garrett GTP38R Turbo, DDP Stage 2 Single Shot Injectors. Shimmed Regulator, CCV Reroute and HX Hose from Dfuser, 4" turbo back straight pipe to GR 5" stack kit w/ 7"mitre cut stacks DPPPOWER.COM, AFE Stage 2 Intake w/ PG7, DP Tuner F5 Chip, 18K Mod Dfuser, SouthBend Clutch, Pro Pods quad a-pillar pod, Autometer Ultra-Lite Series Guages ( EGT, Boost 0-35, Trans Temp, Fuel Pressure and Engine oil temp.), Pro tech cab guard, WELD Sidewinders. Road Armor's!!! Custom Pro Tech toolbox/stack cover, , Sirius Sat. Radio, BD Exhaust Brake, 06 Towing Mirrors w/ LED blinkers and heated
:93C_peelo
My Gallery: http://fordtruckworld.tenmagazines.c...y.asp?id=18074
Singles Club Member #52
Can You Keep Up??
Because I'm trying to. lol
HotSauce2138 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome