Drivetrain questions
I was wondering if anyone could help me figure out what transfer case and transmission my 1998 Tj 2.5 4cyl has? Also is I believe the gear ratio in 98's is 4:10 while in 00 I believe it is 3:73, that is for the dana 30 and 35 found in the four cyl. Is this correct?
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Re: Drivetrain questions
1 Attachment(s)
Originally Posted by Craig Stephenson
(Post 551937)
I was wondering if anyone could help me figure out what transfer case and transmission my 1998 Tj 2.5 4cyl has? Also is I believe the gear ratio in 98's is 4:10 while in 00 I believe it is 3:73, that is for the dana 30 and 35 found in the four cyl. Is this correct?
Engine 2.5L I-4 151 cu in - 1997-2002 * 120 hp @ 5,400 RPM * 140 ft/lbs @ 3,500 RPM * OHV * Sequential port fuel injection * 2 valves per cylinder * Compression ratio = 9.20:1 (97-00) / 9.10:1 (01-02) Transmission Automatic: 30rh - 1997-2002 * 3 speed automatic * Used with 4 cyl models * 23 spline output * Ratios: 1st - 2.74 2nd - 1.54 3rd - 1.00 Rev - 2.20 Manual: AX-5 - 1997-2002 * 5 speed manual * Used with 4 cyl models * 10 spline input * 21 spline output * Ratios: 1st - 3.93 2nd - 2.33 3rd - 1.45 4th - 1.00 5th - 0.85 Rev - 4.74 Transfer Case NV231 Command-Trac - 1997-2006 * Used on all TJs except Rubicon models * 2.72:1 Low range * Slip yoke * Gear driven speedometer signal Gear Ratios 3.73 - 1998-2006 * Optional ratio used with 6 cyl manual and automatic except the Rubicon * Standard ratio used with most 4 cyl automatics * Standard ratio used with 4 cyl 6 speed * Standard ratio used with Dana 44 rear axle except the Rubicon 4.10 - 1997-2006 * Standard ratio used with 4 cyl 5 speed manual * Standard ratio used with Rubicon Axles Dana 30 (181 mm) - 1997-2006 * Front axle used on all TJs except the Rubicon model * Stock gear ratio options = 3.07, 3.55, 3.73, 4.10, 4.56 * Carrier break = 3.55 / 3.73 * Open carrier - no Trac-Lok limited slip option * Ring gear diameter = 7.2" * Ring gear bolts = (10) 3/8 x 20 RH * Low pinion (short pinion) * Pinion shaft diameter = 1.376" * Pinion shaft spline count = 26 * Axle shaft diameter = 1.18" * Axle shaft spline count = 27 both inner and outer * Axle shaft u-joints = 5-760x / 5-297x * WMS-WMS = approximately 60.5" * 5 on 4.5" bolt pattern Dana 35c (194mm) - 1997-2006 * Standard rear axle used on all TJs except the Rubicon model * Stock gear ratio options = 3.07, 3.55, 3.73, 4.10, 4.56 * Carrier break = 3.31 / 3.55 * Optional Trac-Lok limited slip differential * Ring gear diameter = 7.5625" * Ring gear bolts = (8) 3/8 x 24 RH - NOTE: 7/16" x 20 RH used on later model TJs * Low pinion * Pinion shaft diameter = 1.406" * Pinion shaft spline count = 26 * Axle shaft diameter = 1.18" * Axle shaft spline count = 27 * WMS-WMS = approximately 60.5" * 5 on 4.5" bolt pattern * Rubber pressed-in fill plug Dana 44 (216mm) - 1997-2006 * Optional rear axle used on 6 cyl models except the Rubicon model * Stock gear ratio options - 3.55 (97 only), 3.73 * Carrier Break = 3.73 / 3.92 * Standard Trac-Lok limited slip differential on early model TJs / Optional on later model TJs * Ring gear diameter = 8.5" * Ring gear bolts = (10) 3/8 x 24 RH - Note: 7/16" x 20 RH used on later model TJs * Low pinion * Pinion shaft diameter = 1.376" * Pinion shaft spline count = 26 * Axle shaft diameter = 1.31" * Axle shaft spline count = 30 * WMS-WMS = approximately 60.5" * 5 on 4.5" bolt pattern * Available for the 1997 and newer 4.0L TJs only after 7/7/96 * Threaded 3/8" fill plug Also,If you want to know what gears you have look for a tag under one of the diff cover bolts in the 9 o'clock position. This will tell you what ratio the Jeep originally had and likely should still have. Here is an example of an axle tag you would find on a TJ axle: Attachment 4225 |
Re: Drivetrain questions
Thank you very much, very appreciated! I know my axles will not stand up to a 350 swap for wheeling but I am pretty sure you can get an adapter form advance adapters to bolt a 350 chevy to my transmission. What is the concensus on my tranny (AX-5) and transfer case (NV231) standing up to and being reliable enough for some fairly tuff wheeling with this engine swap?
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Re: Drivetrain questions
The axles and tcase might last for a little while but I don't think the ax5 would last more than about five minutes.
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Re: Drivetrain questions
i dont have any problems snapping stock axles with my 4.0,cant see them lasting very long behind a v8
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Re: Drivetrain questions
Thank guys, any input on how hard it is (and what kind of transmission/t-case) to use behind an LT1 350 chevy. I want to retain a manual tranny.
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Re: Drivetrain questions
i would find a manual chev trans and matching t case,better get some fullsize axles too.an LT1 with manual trans will blow those diffs apart.
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Re: Drivetrain questions
Thanks sid, I know the stock axles won't hold up, but I don't want full size axles because of the width! I like how narrow my jeep is for going through tight trails. I'm going to start saving and buy a set of built currie high pinion 9" housings in the stock width with maby 5:29's and 37's. But this is down the road a ways. I also want to four link the rear and go with coil overs all the way around! Once I start to build I will post a bunch of pics.
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