Author Topic: A-518 torque converter issue (Read 4727 times)

EFI-Cuda · « **on:** December 21, 2003 - 06:11:08 PM »

I purchased a mopar A-518 tranny new from the Mopar catalogue and I have been running it in my Cuda successfully for quite a while. I am using a mopar 1900-2100 stall converter and I suspect that it is the reason for my horrible gas mileage. (8 in the city and 11 on the highway) I have a mild 360, a 625 Barry Grant road Demon with vacuume secondaries and 3.23 rear gears. Most of my driving is below 2500 RPM's and I suspect that the converter's stall speed is too high and the converter is not engaged fully during most of my driving. Does anyone else have any experience running an overdrive A-518 in an e-body?

DodgeFreak · « **Reply #1 on:** December 22, 2003 - 06:07:09 PM »

i have a write up on how to get your lock up to work if i get time to scan\send it to you if you want it.

Edit: they put the A518 in a road runner.

EFI-Cuda · « **Reply #2 on:** December 22, 2003 - 06:39:43 PM »

Thanks for the response. The A-518 that is sold from MP is a non-lock-up transmission. It uses just one button to switch the transmission into overdrive. Most of the production A-518's had lock-up converters that were controlled by the vehicle's computer. It is possible for these transmissions to be rigged up to engage the lock-up converter with a toggle switch in addition to a switch to shift the trans into overdrive.

Is the article that you are referring to about a non-lock up transmission or a lock-up A-518?

DodgeFreak · « **Reply #3 on:** December 23, 2003 - 03:14:08 PM »

It was for the lock up 518....it told how to get it to lock with out a toggle switch. But since you don't have the lock up then...it won't help you.

oldvamoparfan · « **Reply #4 on:** January 23, 2004 - 11:11:19 PM »

If you are using a lock up Converter, you can wire 2 relays in the lockup switch lead so that application of the brake,'releasing lock up so you dont have to manually unlock each time you stop. The reason for 2 relays is you have to have a "hold" lead to be able to do this. Ovmf

Chryco Psycho · « **Reply #5 on:** January 26, 2004 - 01:24:23 AM »

I would switch to 3.55 or 3.91 rear gears , you will still have very low RPM on the highway

Wheels · « **Reply #6 on:** February 17, 2004 - 08:03:22 PM »

Im in the process of getting my 360/727 combo worked out... How much does the 518 trans cost and how difficult was it to install?
Would you do it again?

Thx.

oldvamoparfan · « **Reply #7 on:** February 25, 2004 - 08:40:23 AM »

It is possible to gear too high (low numerically) to suit your engine, depending on its state of tune. Most cars get their best fuel economy while running in the fat part of their torque curve. On the limited info I have, I would think 2500 should be pretty good for mpg. This can vary widely according to cam etc. I had a Dodge w/ 400 ci eng that only got 13.5 when running 55 to 60 mph, but got 16.5 running 75. I verified this several times. It had 2.71 gears & 15' wheels. Also, average throttle position has a large effect on mpg, but I know that none of you guys run you cars hard. (HEE-HEE!!!)

Author Topic: A-518 torque converter issue (Read 4727 times)

EFI-Cuda

A-518 torque converter issue

DodgeFreak

Re:A-518 torque converter issue

EFI-Cuda

Re:A-518 torque converter issue

DodgeFreak

Re:A-518 torque converter issue

oldvamoparfan

Re:A-518 torque converter issue

Chryco Psycho

Re:A-518 torque converter issue

Wheels

Re:A-518 torque converter issue

oldvamoparfan

Re:A-518 torque converter issue