View Full Version : Converter slippage ??'s


Twisted
06-17-2002, 07:29:00 PM
Hey Guys,
After reviewing some video, my car seems to be turning alot of rpm's on the big end, not sure if we have tranny issues or excessive converter slippage.
I shift at 7,000 or so, and go through the lights at 6,900 roughly.
She only drops 500 to 600 rpms at shift point.

It is lasting, as far as I can tell it is ok. I guess if it was really hurt, it would take a dump. right?
I contacted my converter guy, and was some what dissappointed by his lack of interest. He asked what I calculated, (roughly 8% slip) and said it was ok.
I contacted JW transmission here locally, and they said 14% slip either due to wheel spin or tranny slip. $2-4 hundred dollars to cut open and see what is going on.

No corrective action taken at this point.
Do we need any?
Things like this, I ponder @ 1000' approaching 125 mph. wierd huh? http://www.nastyz28.com/ubb/biggrin.gif

I hope I don't have a $700.00 door stop.
Maybe, we'll go back to the "boss hog" converter! :O

29.0 tall tire (29.750" at speed )
4.11 gear,
6,900 rpm's at end of 1/4 mile

Any ideas?

Thanks, Jim

------------------
Jim
1974 Camaro
477 BBC, T-400, Furd 9"
Low E.T. 10.79
Top mph 125.83

wwest
06-17-2002, 09:02:00 PM
I just bought a Boss Hogg 4200 stall for $230 from Bowtie http://www.bowtieperformance.com

Cheapest Ive found.

As far as advice - Im no tranny wiz. I just pull out the wallet.



------------------
72SS 406 350T(4200 stall) 9INCH/411 2890 pounds (and dropping)
http://home.att.net/~dwwest/index.html

rscamaro73
06-18-2002, 12:43:00 AM
If you decide to drop the dough on the converter you have, you might as well get it converted to a bolt-apart unit.

Lots bolts around the perimeter and big heavy flanges hold the 2 outter 'shells' together (with a rubber o-ring) VS welding.....and repairs are cheaper & quicker.... http://www.nastyz28.com/ubb/wink.gif

<actually seen this in a mustang mag>

------------------
" ALL Camaros are equal, but some Camaros are more equal than others "

73 LT 454
mailto:rscamaro73@cox.netrscamaro73@cox.net</A>

PaulyZ
06-18-2002, 01:12:00 AM
How does that Boss Hogg work? That is super cheap for such a high stall converter.

I was considering an Edge converter but I can't find anyone who owns one.

PONYEATER
06-18-2002, 11:54:00 AM
Ok I must have missed it but what size is your converter now?

The bolt together units are made by Neal Chance and cost around $1500. The new converter I'm going with will likely be a Precision Industries unit. The only cost around $700!

BTW I calculate you at 15% slippage which is really really really really bad! Are you running a B&M converter?

[This message has been edited by PONYEATER (edited June 18, 2002).]

Twisted
06-18-2002, 10:39:00 PM
PONYEATER,
The converter is a Yank 9".
Seems hard to believe the converter is causing that much loss.
Can a tired transmission create slippage, but still appear to be somewhat normal?
Trans. was rebuilt back in 86-88 era.
Does not hit super hard at gear changes, but that could be due to the stall.
These things are too exspensive to have more than one.
The Boss Hog thing was an older 10" converter I out grew. The guy from the place said they had guys running in the 12's with the 10". I was running 11.50's at the time. He seemed shocked, but sort of proud.

------------------
Jim
1974 Camaro
477 BBC, T-400, Furd 9"
Low E.T. 10.79
Top mph 125.83