Riley N Posted September 25, 2023 Report Share Posted September 25, 2023 So i own a 1948 Canadian Dodge, so pretty much just a 48’ Plymouth P-15 Special Deluxe, what transmission fluid should i use in it, i’m currently changing the clutch and thought i might as well change the transmission fluid but don’t know what to put in it, thank you for anyone who helps me out Quote Link to comment Share on other sites More sharing options...
Sam Buchanan Posted September 25, 2023 Report Share Posted September 25, 2023 This topic has been discussed on the forum at least...oh.......nine million times. Here is a link from a Goggle search: https://www.google.com/search?q=site%3A+p15-d24.com+transmission+fluid&oq=site%3A+p15-d24.com+transmission+fluid&aqs=chrome..69i57j69i58.11423j0j4&sourceid=chrome&ie=UTF-8#ip=1 Having said that, the old standby was GL1 which some Mopar oldies still use. If you want to move into the 21st century Redline tranny lubricants such as MT90 and MTL are a great choice. They solved crunchy shifts in my '48 Plymouth. https://www.amazon.com/dp/B00NTEWQ1U?psc=1&ref=ppx_yo2ov_dt_b_product_details 2 Quote Link to comment Share on other sites More sharing options...
Riley N Posted September 25, 2023 Author Report Share Posted September 25, 2023 10 minutes ago, Sam Buchanan said: This topic has been discussed on the forum at least...oh.......nine million times. Here is a link from a Goggle search: https://www.google.com/search?q=site%3A+p15-d24.com+transmission+fluid&oq=site%3A+p15-d24.com+transmission+fluid&aqs=chrome..69i57j69i58.11423j0j4&sourceid=chrome&ie=UTF-8#ip=1 Having said that, the old standby was GL1 which some Mopar oldies still use. If you want to move into the 21st century Redline tranny lubricants such as MT90 and MTL are a great choice. They solved crunchy shifts in my '48 Plymouth. https://www.amazon.com/dp/B00NTEWQ1U?psc=1&ref=ppx_yo2ov_dt_b_product_details Thank you so much! also how much should i use? i know there is a full hole but how much should i buy? Quote Link to comment Share on other sites More sharing options...
DJK Posted September 26, 2023 Report Share Posted September 26, 2023 12 hours ago, Riley N said: Thank you so much! also how much should i use? i know there is a full hole but how much should i buy? My repair manual shows 2 3/4 pts. Quote Link to comment Share on other sites More sharing options...
Kilgore47 Posted September 26, 2023 Report Share Posted September 26, 2023 Whatever you use just make sure it is brass friendly. Some of the modern fluids have additives that will damage the brass in these old transmissions. Quote Link to comment Share on other sites More sharing options...
Sam Buchanan Posted September 26, 2023 Report Share Posted September 26, 2023 13 hours ago, Riley N said: So i own a 1948 Canadian Dodge, so pretty much just a 48’ Plymouth P-15 Special Deluxe, what transmission fluid should i use in it, i’m currently changing the clutch and thought i might as well change the transmission fluid but don’t know what to put in it, thank you for anyone who helps me out It looks like you don't have a service manual---you must have one if you intend to maintain/repair your car. If your car is similar to the P15 here is one source: https://www.rockauto.com/en/moreinfo.php?pk=10593924&cc=1486874&pt=10335&jsn=379 Quote Link to comment Share on other sites More sharing options...
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