Opinions Please - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Opinions Please

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineCustom Tire covers for your Jeep at Jeephut.comThe Spring DynoMax rebate is here for 2015!

Reply
Unread 02-27-2015, 04:13 PM   #1
azstsundevils
Registered User
1984 CJ7 
 
Join Date: Jan 2014
Location: Salem, Oregon
Posts: 65
Opinions Please

I have an 84 CJ7. original 258 with 267k, D300, T5. Weber 38 and upgraded dizzy. D30 front and AMC20 one-piece rear with 3.31 gearing. 4.5" lift with 33s.

Runs fair- minus 8 mpg (but yeah I know its a Jeep) and 5th gear is worthless and going uphill on freeway puts we with grandma in the slow lane (65 is max speed but that's OK on flat road as I am up there and I am not in that much of a hurry - but maybe 50 on a good upgrade)

So thinking options to update and make it more reliable and with more oomph...budget is $3500-$4000. Crate engine? Tranny? New gearing? Fuel injection? And something that won't take forever and with help I can maybe do on my own...otherwise with labor costs what is the best bang for the bucks?

azstsundevils is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 04:56 PM   #2
jeepwhore
Hair puller xtraordinaire
 
jeepwhore's Avatar
1984 CJ7 
 
Join Date: Jun 2006
Location: Kamloops, BC
Posts: 3,348
The engine is up there in miles but even with a rebuild I don't think you'd be happy with the get up and go. Gears are going to make the biggest difference and by the sounds of it you are going to need to pay someone to do it. I would budget somewhere around $1000-$1200 (more if you plan to add traction devices as well) per axle for parts and labour. With whats left of your budget you should easily be able to afford a lower mileage 4L (inculding all the FI bits and wiring harness) from a wrecker and get that swapped in to compliment the new gears.
__________________
'84 CJ-7: Yota axles (spartan locked front, e-locked rear) 4" BDS, 1" Daystar & 3/8" shackle lifts, 35" X-Terrains on steelies, YJ Tub & family roll bar, heater blower upgrade, 4.2L w/MC2100 & Team Rush, Warn 8274. Rebuilt 4.2/4.0 hybrid, AX15 and twin sticks/clocking ring waiting to go in.

The advertised position for a topless, dirty jeep girl has been filled......by my wife. Thanks to all that applied.
<------------and yes, that is her.
:-D
jeepwhore is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 04:57 PM   #3
Dadamsnv
Web Wheeler
 
Dadamsnv's Avatar
1977 CJ5 
 
Join Date: May 2012
Location: Sun Valley, NV
Posts: 3,957
I think the cheapest way to make that thing move better is gearing. With gears and install kits, it's about $500 per axle to do it yourself. I've heard of people doing gears with almost no tools, but I use a $150 shop press, $60 bearing puller, $30 magnetic dial gauge, and some more household tools. So about $1300 dollars and a few days/weeks of setting up gears and you can make much better use of your current combo
__________________
Sell me your Scout II Dana 300!!!

I'd prefer one with a manual bull gear, but I'd consider buying one with an automatic bull gear for the right price.
Dadamsnv is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 05:03 PM   #4
Dadamsnv
Web Wheeler
 
Dadamsnv's Avatar
1977 CJ5 
 
Join Date: May 2012
Location: Sun Valley, NV
Posts: 3,957
I run 4.1:1 gearing with my 33's. Granted I have a 304 with a couple goodies, but it gits pretty good for a piece of farm equipment. With your 5th gear, you'll be turning about 2600 RPM at 60 MPH I think.
__________________
Sell me your Scout II Dana 300!!!

I'd prefer one with a manual bull gear, but I'd consider buying one with an automatic bull gear for the right price.
Dadamsnv is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 05:11 PM   #5
streetpro
Observing GIC
 
streetpro's Avatar
1978 CJ7 
 
Join Date: Oct 2012
Location: Orange County, CA
Posts: 81
1st prize for dadamsnv.

33in/4.10 as well. With a 5th gear he might do 4.56...
streetpro is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 05:12 PM   #6
ChiefSpoonS
Registered User
1979 CJ7 
 
Join Date: Jul 2007
Location: Troutman, North Carolina
Posts: 177
1200 Per axle? that seems steep; I have a local 4x4 shop here that quoted me i think 1200 for 4.88 Gears for D30/C8.25. This included the install, gears, and lifetime warranty
ChiefSpoonS is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 05:16 PM   #7
Matt1981CJ7
Web Wheeler
 
Matt1981CJ7's Avatar
1981 CJ7 
 
Join Date: May 2011
Location: Elbert, CO
Posts: 11,828
Gearing will certainly help the most with the existing setup.

That said, with 276K on the 258 and T5, I think rebuilds on both of those is in your near future.

Your budget may be a little tight, depending on how much of the work you can do yourself.

Matt
Matt1981CJ7 is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 05:21 PM   #8
cjjohn
Registered User
1985 CJ7 
 
Join Date: Feb 2010
Location: Bakersfield
Posts: 66
Good advice above. I also run 4:10's and 33's on my CJ. It's just about perfect I think.
__________________
1985 CJ7 Renegade, Chevy 5.3, 4L60E, Currie 9" rear, Dana 30 front, ARB lockers at both ends.
cjjohn is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 05:28 PM   #9
ChiefSpoonS
Registered User
1979 CJ7 
 
Join Date: Jul 2007
Location: Troutman, North Carolina
Posts: 177
now this thread has me worried about my 3.73 gears...
ChiefSpoonS is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 05:29 PM   #10
jeepwhore
Hair puller xtraordinaire
 
jeepwhore's Avatar
1984 CJ7 
 
Join Date: Jun 2006
Location: Kamloops, BC
Posts: 3,348
Quote:
Originally Posted by ChiefSpoonS View Post
1200 Per axle? that seems steep; I have a local 4x4 shop here that quoted me i think 1200 for 4.88 Gears for D30/C8.25. This included the install, gears, and lifetime warranty
That is more likely to be a worst case scenario......shop rates vary so much depending on location and there are other variables that can affect price (like if the OP took the whole Jeep in to be re-geared rather than pulling and stripping the axles himself, etc.) For me personally, that was the cost I was looking at because I get bent over on the price of bringing parts into Canada (typically 2x what you guys pay) and I factor in for unforseen issues like other wear items that may need to be replaced while everything is apart.
__________________
'84 CJ-7: Yota axles (spartan locked front, e-locked rear) 4" BDS, 1" Daystar & 3/8" shackle lifts, 35" X-Terrains on steelies, YJ Tub & family roll bar, heater blower upgrade, 4.2L w/MC2100 & Team Rush, Warn 8274. Rebuilt 4.2/4.0 hybrid, AX15 and twin sticks/clocking ring waiting to go in.

The advertised position for a topless, dirty jeep girl has been filled......by my wife. Thanks to all that applied.
<------------and yes, that is her.
:-D
jeepwhore is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 05:32 PM   #11
JeepHammer
Running On Empty...
1973 CJ5 
 
Join Date: Aug 2007
Location: South West Indiana
Posts: 10,887
267K miles is a BUNCH.
I think a compression check, a leak down test, and checking to make sure you have camshaft 'Bumps' left would be a good start before you order that 'Crate' engine...

8 MPG is WAY too low, with 3.31:1 Gears, you *Should* be getting around 18 MPG.

-----

*IF*...
And that's a BIG *IF* with 267K on the clock!
That engine is still making compression, and still has 'Bumps' on the camshaft...

I'd throw some money at tuning rather than spending the bankroll...

I don't know what 'Upgrade' you did to the distributor, but once you get control of the spark energy,
And get that spark energy to the spark plugs,
Then it's a matter of ignition curve and carb adjustments.
JeepHammer is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 05:33 PM   #12
ChiefSpoonS
Registered User
1979 CJ7 
 
Join Date: Jul 2007
Location: Troutman, North Carolina
Posts: 177
Quote:
Originally Posted by jeepwhore View Post
That is more likely to be a worst case scenario......shop rates vary so much depending on location and there are other variables that can affect price (like if the OP took the whole Jeep in to be re-geared rather than pulling and stripping the axles himself, etc.)
Fair enough; wasnt trying to sound like a ***; just shocked
ChiefSpoonS is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 06:13 PM   #13
Ken4444
Corripe Cervisiam
 
Ken4444's Avatar
1985 CJ7 
 
Join Date: Oct 2005
Location: Houston, Texas
Posts: 4,703
This is not my area of expertise, but hey, this is the Internet. For $3500 to $4000, I would put in a stronger transmission and a modern engine, perhaps a mid-mileage Vortec, a crate 350, or a built 4.0.

The current 258 and T5 are basically at the ends of their lives. Why spend money on re-gearing if you're going to have to deal with the engine and transmission already?
__________________
"I give you a republic, if you can keep it." - Benjamin Franklin
Ken4444 is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 06:23 PM   #14
Matt1981CJ7
Web Wheeler
 
Matt1981CJ7's Avatar
1981 CJ7 
 
Join Date: May 2011
Location: Elbert, CO
Posts: 11,828
Quote:
Originally Posted by Ken4444 View Post
This is not my area of expertise, but hey, this is the Internet. For $3500 to $4000, I would put in a stronger transmission and a modern engine, perhaps a mid-mileage Vortec, a crate 350, or a built 4.0.

The current 258 and T5 are basically at the ends of their lives. Why spend money on re-gearing if you're going to have to deal with the engine and transmission already?
Agreed. Stick about 300 ponies and a heavy duty 4-speed in that thing, and the gears will be fine.

Matt
Matt1981CJ7 is offline   Reply With Quote Quick reply to this message
Unread 02-27-2015, 07:40 PM   #15
agear
Registered User
1984 CJ7 
 
Join Date: May 2011
Location: norfolk, virginia
Posts: 1,891
Quote:
Originally Posted by ChiefSpoonS View Post
now this thread has me worried about my 3.73 gears...

You have a 4 spd. 1:1 final drive. 3.73's should be perfect

Azstundevils, check for slop in the pinion on the front and rear axles.
__________________
1984 jeep cj7, 258 I6, rebuilt T176,rebuilt Dana 300, amc 20 , dana 30, 4.10's Trac-lok in rear , 4.10's detroit soft locker in dana 30, 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Line ex. weber carburetor. factory tach. factory clock ,oem replacement speedomter cluster, and oil pressure gauge, factory volt gauge.
agear is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.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 e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.