Fastcast Posted February 22, 2009 Posted February 22, 2009 Is there any other TC that will work on 2.8v6 automatic w/Selectrac, other than the NP228 or NP229 TCs? Will a NP207, NP208, NP 219 or some other bolt right up?.....I'm having a heck of a time finding a 228 or 229 at any local salvage yards but some of the others seem to be available......Any help is appreciated!
Geonovast Posted February 22, 2009 Posted February 22, 2009 I believe a 207 should bolt up, as long as the spline count and input lengths are the same. But, you won't have Selectrac anymore, it's a part time case.
Cheech Posted February 22, 2009 Posted February 22, 2009 My 86 four banger has the NP 207 behind the automatic trans.
Pete M Posted February 23, 2009 Posted February 23, 2009 I think the early 242s will bolt up. They will have the 21 spline input shaft at least.
Geonovast Posted February 23, 2009 Posted February 23, 2009 Length may be an issue though, I know my 87 NP231 wouldn't bolt up to my 86 AX-4 because the input lengths were different.
Fastcast Posted February 23, 2009 Author Posted February 23, 2009 Ok, I was thinking the 207 may work also but what about the Selectrac vacuum, which I believe is straight off the transfer case......This is not a front axle disconnect setup. Wasn't the 207 setup for a front axle disconnect? How would I handle that? This truck has the center console 2wd/4wd switch/lever. Thanks!
Geonovast Posted February 23, 2009 Posted February 23, 2009 SelectTrac wouldn't have any vacuum, since there is no CAD. As for your 207, just cap off the vacuum plugs so nothing gets in there. You won't be using them, since you have a non-CAD axle. All the vacuum does is engage the front axle when you put it in 4wd, but since your axle is always engaged, you don't need it.
Fastcast Posted February 23, 2009 Author Posted February 23, 2009 Ok, I see....So the center console, switch/lever is not vacuum but electronic?.....We don't have the TC out yet, the truck will still drive in 2wd. This is my brothers Comanche and I'm trying to help him out.....He's still driving it at the moment in 2wd but wants to get it fixed. When you flip the switch from 2wd to 4wd it sounds like gears grinding, an awful sound but what's strange is if it's in reverse you can engage the 4wd and no grinding but as soon as you shift to drive the grinding starts again. :dunno:
Geonovast Posted February 23, 2009 Posted February 23, 2009 No, it's not electronic. There's a physical linkage that shifts the transfercase when you move the lever. You should be able to use your existing linkage on the new TC, but you may have to adjust it.
Fastcast Posted February 23, 2009 Author Posted February 23, 2009 Ok, got it....Forgive my ignorance! Thanks for all the help GV!
Geonovast Posted February 23, 2009 Posted February 23, 2009 It's cool. Never a stupid question :cheers:
Pete M Posted February 23, 2009 Posted February 23, 2009 When you flip the switch from 2wd to 4wd it sounds like gears grinding, I'm not too familiar with the selec-trac MJs. What switch are you referring too? Is it a switch, or a handle? Got a picture?
mjeff87 Posted February 23, 2009 Posted February 23, 2009 It's this little thingamagiger Pete.....it pops into the center console behind the shifter where the little coin-holder is: Image Not Found
Fastcast Posted February 23, 2009 Author Posted February 23, 2009 Yep, that's the little thingamagiger........I was thinking, when I crawled underneath, looking at the TC it has what looked like some typical round/saucer looking vacuum pump thing connected to it but maybe I'm mistaken. Do you guys know if the 208 TC might work in it also.....Seems they may have a better reputation than the 207, from what I've read. He did find a 207 at a local salvage yard (the guy claimed it was a 228) but when we got there it was 207 and looked like it had been opened up before, with all the orange silicone oozing from everywhere so we left it. For the record, the truck came originally with a 228 that went bad years ago and he replaced it with a 229.....That has been in there for 10-12 years and now also appears to be bad. :wall: These must not have been very durable. It's basically a part time driver in the winter, that never even gets off road, unless to drop some branches on my back property. Thanks to everyone!
Fastcast Posted February 23, 2009 Author Posted February 23, 2009 Oh, I should also mention.....His thingamagiger has no pull knob under the left/right 2wd/4wd lever. With his, all you do is flip that lever and that's it....No pull knob to engage, as far as I know.
mjeff87 Posted February 23, 2009 Posted February 23, 2009 the saucer thingy is a vaccuum motor that is attached to the mode switch in the cab (the one pictured above). When you flip the switch, you send a vac signal to the motor, which is connected to the mode fork in the case via a rod, and switches the case to 4WD (or back to 2WD, depending). The shift lever in the cab is also connected to the case, to the range selector on the side. You switch between high, neutral, and low range with it. Difference between the 228 and 229 is that the 228 has an open differential operation and the 229 uses a (very expensive to replace) viscous coupling, just like the 249 cases in some Grand Cherokees. Most likely the VC in his case is shot.
Fastcast Posted February 23, 2009 Author Posted February 23, 2009 Great info mJeff87....So the vacuum lines for the switch/lever should hook up to the vacuum on the 207 or possibly 242 (like Pete recommended) as long as the spline counts and input lengths are the same, they should work, other than not having full time 4wd? I thought I heard some thing about the spline counts being different on the manual trans as compared to the auto?? He has the TF904 auto in his. I think he just wants to go buy one and set it off to the side until he can get around to it (since it still runs in 2wd) but I'm not sure we'll ever figure this out for sure without taking the 229 out and comparing it to the others. On a different topic...He needs a new gas tank.....Any recommendations on where to get one?....I came across this place and the price looks good and the gentlemen said they're made in Canada (not China :clapping:) and have a 3 year warrantee. http://raybuck.com/i-67923-gas-tank-for ... wo-fi.html
Pete M Posted February 23, 2009 Posted February 23, 2009 If it were my truck, I'd look for an early (87-90?) 242 and swap in the corresponding shifter handle to do away with the vacuum stuff altogether. :thumbsup:
Eagle Posted February 24, 2009 Posted February 24, 2009 Fastcast -- Where are you located? I have a wrecked '86 with the 2.8L automatic. It may have your transfer case under it -- I don't know because the guy from whom I got it had already stripped the interior so there were no parts to identify from up topsides if it was Command Trac or SelecTrac. If you're anywhere near CT and interested, let me know and I'll take a look.
Fastcast Posted February 24, 2009 Author Posted February 24, 2009 Thanks guys.....I'm going to check into that 242 it sounds like a stronger TC than some of the others. Eagle, I'm in Stark Co. Ohio.....I can't believe I'll be anywhere near CT....In 40 years I've never seen the State, although would love to. I appreciate your offer though! :cheers:
mvusse Posted February 25, 2009 Posted February 25, 2009 Heck, you just barely north of me. (Northern Tuscarawas County). If you ever need help wrenching let me know.
Fastcast Posted February 25, 2009 Author Posted February 25, 2009 I guess it is a small world! Southern Stark Co. here.....East Sparta.....Was just in Strasburg on Sat. Stopped at the Gunshop and the Provision.....Thanks for the offer and if we need a hand, I'll drop ya a PM! :cheers:
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