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harley143

Member
Joined
Jun 21, 2018
Posts
9
Given 89 holiday rambler 25anniversary special long and short Trans is cracked told engine runs and is fine Trans cracked in half at bellhouseing not weldable milage is 70 000 told Transmission was good up till that point . Transmission is out looking for possibilities. The specks are a 454 4bl holly elderbrook manifold kn air sty and more turbo 400 ? I want to make sure runs for trips all it's in great shape what I like is the aluminum body. Am I crazy to start this project!
 
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Rene T

Site Team
Joined
May 20, 2011
Posts
18,416
Location
Farmington NH
Help! I not sure this the right place to ask, but here it goes.
I own a Rexall Airbus 2010 with two full body slides. I need to replace my taillight plastic covers, help please!
Welcome to the forum.
Help! I not sure this the right place to ask, but here it goes.
I own a Rexall Airbus 2010 with two full body slides. I need to replace my taillight plastic covers, help please!
Welcome to the forum.
What you should do is start your own post and provide as much information that you can especially in the title. You can post it under the motor home section for now. If a staff member feels it would get better exposure in another section, they’ll just move it.
Pictures really help.
 

Carbonation

Well-known member
Joined
May 30, 2021
Posts
93
Location
Midwest
Given 89 holiday rambler 25anniversary special long and short Trans is cracked told engine runs and is fine Trans cracked in half at bellhouseing not weldable milage is 70 000 told Transmission was good up till that point . Transmission is out looking for possibilities. The specks are a 454 4bl holly elderbrook manifold kn air sty and more turbo 400 ? I want to make sure runs for trips all it's in great shape what I like is the aluminum body. Am I crazy to start this project!
TH400 can be set up to tow, (which even if you aren't, you are moving a considerable amount of weight).
TCI has off the shelf trans in the 2200 range.
B&M considerably less, your mileage may vary.
A HD junkyard core and an afternoon on a workbench (if you have mechanical skills) and you'll have a working trans for a grand.
With a Holley 4bbl and Edelbrock manifold (depending on type) I bet fuel mileage is poor. Consider an upgrade to EFI for more reliability, easy cold starts, and better MPG.
I just camped next to a guy that had a 502 with all the goodies in his MH.
Looked nice, sounded healthy, but a miserable 4-5 MPG. That gets real expensive at 4.00 a gallon.
 

Isaac-1

Well-known member
Joined
Dec 3, 2016
Posts
5,267
Location
SW Louisiana
You can get a rebuilt heavy duty TH400 transmission for around $1,500, as to if you are crazy it depends on if you want a nearly 35 year old motorhome with a 3 speed transmission, and how you plan to use it. Such things may be ok for local and perhaps regional travel, but I would not want to travel around the country in such a beast, that was designed in the era of the 55 mph national speed limit.
 
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