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Time to replace my TH400/475 transmission
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Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
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Thanks, Mary Ray. It seems that this tail housing with the brake is fairly rare. Bearings are no longer being made. I may post another thread on this housing alone, bearing and seal numbers, also brake parts when I find out what they are.

Trans should be done today


8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3231 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
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I fired up the coach! Thumbs Up

Trans seems to work fine, no leaks. Still refilling it, lots of air in the systems. So far about 11 qts still needs about 2 qts more.

All forward and reverse gears are working, drove back and forth about 6 feet.

It was over 90 today, slowed things a bit. I will refill tomorrow and road test, should be fine. Thumbs Up
Have Barth, will travel Tooling Along


8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3231 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
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Ran a test drive today. What a difference! confusion
I did not realize how much noise and vibration was coming from the old transmission. I assumed ujoints, driveshaft, rear axle, etc.

About 80% of the driveline noises are gone. A steady whine and some transient load related growls are gone. I am feeling less driveline related vibrations as well. So far I am very pleased.

TCI claims the torque convertor is "tighter" than OEM by about 4% at "lockup." I am seeing a slightly lower idle rpm when in gear with brakes on, perhaps more drag from the torque convertor… more importantly, I am seeing slightly less engine rpm at cruise speeds. I can't claim 4% yet but I will watch the tach and the mileage on the Allegan trip.

I'm still surprised how much noise and vibration the old trans made. Long live the new! Thumbs Up

TCI TH400 HD towing transmission #211001 $1451.24 including shipping

TCI RV/towing torque convertor #241110 $375.00 including shipping

2 NDH Z993L09 ball bearings (eBay) $32.00 including shipping, these are no longer made, getting harder to find

1 CarQuest/National 2457 rear seal $22.25

13 qts ATF ~$35.00

Ah, the things we do for our Barths. mechanic

Have Barth, will travel Tooling Along


8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3231 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 3/11
Picture of Tom  and Julie
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Now sell the old one:http://www.ebay.com/sch/i.html?_odkw=th%20400%20transmission&Brand=Chevrolet&_sop=16&_dcat=171114&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR7.TRC2.A0.H0.Xth400%20transmission.TRS1&_nkw=th400%20transmission&_sacat=0&_clu=2&_fcid=1&_localstpos=77520&_stpos=77520&gbr=1&_zpclkd=1


1993 32' Regency Wide Body, 4 speed Allison Trans, Front Entry door, Diamond Plate aluminum roof &
1981 Euro 22' w Chevy 350 engine and TH 400 tranny
 
Posts: 1368 | Location: Houston Texas | Member Since: 12-19-2006Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 10/08
Picture of MWrench
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quote:

I did not realize how much noise and vibration was coming from the old transmission. I assumed ujoints, driveshaft, rear axle, etc.


Did you put the "E" brake drum back in? Might check the balance of that before you do. That is a lot of rotational mass spinning at high RPM during cruise.

Wish I could replace my MD3060 for that $$$$. I am not looking forward to the day I have to R&R that big heavy beast!


Ed
94 30' Breakaway #3864
30-BS-6B side entry
230 Cummins, Allison 6 speed
Spartan chassis
K9DVC
 
Posts: 1895 | Location: Los Gatos, CA | Member Since: 12-08-2005Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
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I did not replace the brake parts. It was a cable system. All cables are rusted and were cut off. The drum is fairly large and may have been out of balance, just the weight hanging on the tailpiece was more than I like. It has never worked since I've owned the coach.

If I replace the brake system I will have to balance the drum, free the shoes, and fabricate cables. Considering the trans already has parking pawl to lock trans the additional brake does little.

I am thinking of putting a parking brake system on the tag axle. It has drum brakes which could be adapted to the standard RWD cable style. That way I would have two brake drums rather than one and doesn't depend on ujoints to work. hmm


8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3231 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Doorman
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Although you only have 1 drum, it has a 4.88 ratio gear advantage over the axel mounted brakes and 4 wheels. Although not much it will stop you in a emergency. I would block my wheels on any kind of incline. With the weight of these coaches I wouldn't rely on just the 400 parking paw. Better safe than sorry.

Enjoy your GTG. Looks like weather should be great. If I had not spent 4 days in Bucanan Mi. over the 4th I would have tried to make the GTG. Can't make Kenny's GTG due to prior commitment. Have fun and be safe.


1986 31' Regal -1976 Class C
454/T400 P30 -350/T400 G30
twin cntr beds - 21' rear bath
 
Posts: 779 | Location: Dayton, Ohio | Member Since: 09-27-2009Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
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Actually I have a 4.56 rear end, I never park on any incline to speak of. I have chocks for hills if needed.

I agree, the brake is better than nothing but mine has never worked. Rather than spend time and money I will try the tag axle thing. (I am due for periodic inspection of bearings, etc anyway. Next thread will be "Gimme a brake, part 3: Neway TA-5 tag axle.") There seems to be minimal info on that axle, we have the TA-3 manual but nothing on TA-5. Bill h did some work on his and I will try to collect all the data in one thread.


8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3231 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
posted Hide Post
I ran 86Barth to the Allegan GTG this weekend, about 360 miles.

The new transmission is great. Much more quiet and noticeably less vibration. Shifts are smooth and positive. Upshifts on full throttle are about 200 rpm higher than before, allows engine to stay in the power band without lugging down after the shift. Downshifts are smooth and more sensitive to throttle than before.

It appears the torque converter has less slip, it hooks up sooner at lower rpm and it looks like I'm getting about 2mph more than before at the same cruise rpm. I have not gassed up yet, I hope to see a slight mileage improvement.

Overall I am very happy with this setup. Should have done it sooner. mechanic


8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3231 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 8/16
Picture of Kevin
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quote:
Originally posted by Doug Smiley:
why not upgrade??


www.rvtechlibrary.com/chassis/XLAK40401.pdf


Doug, I am not sure you have posted the correct link, or maybe I just did not read enough. What does transmission exchange that Steve VW has done have in common with the Neway Suspension link you have posted? hmm
 
Posts: 2586 | Location: Northeast , Ohio | Member Since: 07-29-2012Reply With QuoteReport This Post
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