Last post on Jul 09, 2013 at 7:15 AM
You are in the Isuzu Trooper
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Isuzu Trooper, SUV
#9642 of 11966 Re: TOD Clunk and other Q's: Need any suggestions ASAP [seanreid #9637]
May 06, 2004 (10:40 am)
I have a 1999 Trooper (Luxury) and a 1998 Trooper (Luxury). Neither of them "slam" or "thunk" when I press the TOD button. But, there is a roar in TOD with the 1998. I think that is because there are 3 different manufacturers tires on it. Tommorrow, that will be verified when I get the tire issue worked out.
I like Isuzu Troopers and think they are great vehicles. Some of them do burn oil between oil changes but to me that issue is not a show stopper.
Was that list of 35 items the 60K service? If so, I also need to do it as my 1999 has 65k on it. Too bad we don't live closer together as we can get these Troopers side by side and do the maintenance assembly line style.
#9643 of 11966 Re: Clunk, etc. [seanreid #9639]
May 06, 2004 (12:13 pm)
Sean - my '99 might or might not clunk when TOD engages. Sometimes it does and sometime it doesn't. Things that help mitigate the clunk:
1. Check the transmission and transfer case mount bolts. Mine were loose when I bought the thing brand new. Having those tightened up helped a lot.
2. Do not engage TOD unless you are driving in a straight line. If the front axle shafts are turning at different rates when TOD is engaged, you are guaranteed a clunk. This, however, will not always prevent a clunk.
Regarding the transfer case whine, they all whine a little bit if you listen carefully. It shouldn't be a roar in your ears, but keep in mind you are sitting on top of a transmission that probably contains a multirow chain or some large gears swirling in Dexron II, not gear lube. They will make some noise.
I don't think you will ever achieve a seamless transition. If you do consistently, I would worry that TOD is not engaging properly.
#9644 of 11966 Clunking and maintenance: Bought the 99
May 06, 2004 (8:47 pm)
I had the truck checked out by my mechanic today and then drove it back to MA and bought it for $10K. It seems like a good vehicle for the money, has a 2500 mile powertrain (plus various items) warranty and the dealership gave me an excellent trade allowance for my 2002 Avalanche. (Yes, I traded "down" financially. We have been making payments on four vehicles (business and personal), one less vehicle with payments is a good thing). If this one holds up and is reliable, it will be a bargain - all the luxury bells and whistles for 10K.
I was unable to duplicate the TOD clunk today and wonder if, without realizing it, I was engaging TOD with the wheels turned a bit (sometimes) last night. I was tired, it was a long drive, etc. Maybe I wasn't being careful enough. Or, maybe it hadn't been used much in months of sitting at the dealership (very possible) and needed some exercise. I also think I'm going to make a practice of engaging TOD only at very slow speeds (or when stopped). It certainly can't hurt to lessen the load on the drivetrain that way. My mechanic, who's worked on all of our vehicles, thinks "shift on the fly", in any form, is hard on the drivetrain even though the manufacturers may say its OK.
This "new" Trooper has new tires all around as well as new front rotors and pads. The rear pads are also new but my mechanic thinks the rear rotors are no good. So, after some negotiating with the Lexus dealership, they agreed to give me a check for $400 to be used with my mechanic for a rear brake job (about $300) and towards a full fluids change. My inclination is to change all fluids. ie: power flush the tranny, change to Mobil 1 engine oil and filter, put fresh ATF in TOD unit, fresh synthetic hyphoid oil in front SOTF, fresh synthetic in both diffs. Does that make sense? That way I'll be starting out with new tires, new brakes and fresh fluids. I'll have them look at the coolant and see if that's worth flushing too (anyone have advice on that?) Naturally, we'll grease the driveshaft fittings and all the other grease points. I'll also do the serpentine belt because the truck is on its first belt still (I was told).
Does anyone have a source for good rotor prices? Are stock rotors best or are there better aftermarket options? NAPA rotors OK?
Isuzu specs timing belt replacement as 75,000 - 100,000 miles (depending on driving conditions). Is there any need to do it earlier?
cwm - My list is sort of a 60K service but it's a homebrew list I put together based on looking at the manual and thinking about my specific truck. A trooper wrenching party would be great.
Where the heck is the ATF fill bolt on the tranny? Same question for TOD unit. My mechanic and I were both under the truck today (on a lift) and couldn't find either one. We ignorant folks need some enlightening.
Does Haynes or Clymer make a repair manual that covers a 99 trooper? I'll check Amazon.
Thanks for the replies so far, I'm all ears (well, not quite like Ross Perot but my ears are wide open)
#9645 of 11966 checked the mounting bolts this AM
May 06, 2004 (8:49 pm)
they seemed tight
#9646 of 11966 Happy with mpg so far
May 06, 2004 (8:56 pm)
My first tank of gas (midgrade) with the "new" Trooper gave me 19.4 mpg in a mix of highway (mostly) and back road driving.
#9647 of 11966 Re: Clunking and maintenance: Bought the 99 [seanreid #9644]
May 07, 2004 (3:48 am)
Agreed that the slower you are going, the less stress you will put on the drivetrain. You will rarely, if ever, get a clunk when you are going slowly.
If I recall, the TOD drain and fill bolts are on the back side of the transfer case. Again, if memory serves, they are both similar to gas or pipe bolts, in that they have a square opening (for use with a 3/8 ratchet or extension) and are tapered so they get tighter as you thread them in. The drain is obviously toward the bottom of the transfer case, the fill bolt about 1/2 way up. The TOD takes Dexron II ATF. There is no separate transfer case lube--it's all one housing.
I believe the ATF fill bolt is somewhere on the pan, but I have never cracked it open so that's a shot in the dark.
#9648 of 11966 Re: TOD Clunk
May 07, 2004 (6:05 am)
My '99S clunks in specific circumstances at anything above 20 MPH. Basically if I have been driving for a while (more than 20 minutes) in 2wd and then engage TOD it clunks and does not sound good.
Normally it goes in fine, like if I pull out and it is raining hard and then decide to engage right away, even up to 50 MPH. What my theory is, and I found some "web-facts" confirming this a long, long time ago was that the heat and speed at which the front end (axle, hubs, etc.) will be less than the rear after an extended period of driving in 2wd. So the system is out of sync when you engage.
I have confirmed this by having it clunk when engaging and then continuing driving for a longer while, once everything seemingly is the same temp I can engage and disengage quietly. So my solution is to be aware of the "feature" and when hot, or coming off a highway trip I wait for a stoplight to engage.
I have have my fluids changed/flushed/checked often, so I don't think it is a fluid problem. Axle and differential at 15 and 30K as well as trans and TOD. I do a lot of offroading so I try to keep the drivetrain happy.
#9649 of 11966 Warranty Question
May 07, 2004 (9:32 am)
A friend on mine just picked up a 2000 with just under 50K on it. The 1999 warranty says it transfers to all original and subsuquent owners. I am pretty sure the 2000 warranty transfers, but I think it drops to 5 yr/60K on the subsequent owners? Can anyone with a 2000 confirm or deny?
May 07, 2004 (9:54 am)
Picked up a set of rear rotors at autozone for like $40/each so far 50K miles and they are good. For pads I like OEM from St. Charles, 50K+ on this set of pads.
#9651 of 11966 TOD roaring noise
May 07, 2004 (12:44 pm)
Follow up: I replaced 2 tires so that now all 4 are matching and the TOD roaring noise has disappeared.